The research, published in BMC Infectious Diseases by a team at Jeonbuk National University, took advantage of one of the world’s most comprehensive health databases, the Korean National Health Insurance Service. The investigators identified 31,175 patients diagnosed with tuberculosis between 2002 and 2013 and compared them with 84,522 matched individuals who had no tuberculosis diagnosis. To ensure the two groups were genuinely comparable, the team used propensity score matching, a statistical technique that balances factors such as age, sex, and underlying illnesses between the cohorts. They then tracked how often either group received a diagnosis of optic neuropathy, the umbrella term for damage to the optic nerve that can blur vision, drain color perception, and in severe cases cause permanent loss of sight.

The headline result was sobering. Even after adjusting for age, sex, comorbidities, and ethambutol exposure, tuberculosis patients were 28 percent more likely than matched controls to be diagnosed with optic neuropathy, with an adjusted hazard ratio of 1.28 and a 95 percent confidence interval of 1.05 to 1.56. That elevation alone would be notable, but the more striking pattern emerged when the researchers stratified patients by how much ethambutol they had received. Compared with tuberculosis patients who had not been exposed to the drug, those given less than 10 milligrams per kilogram of body weight per day had nearly double the risk, at a hazard ratio of 1.94. For doses of at least 10 but less than 15 milligrams per kilogram per day, the risk nearly tripled, reaching 2.98. And at the highest exposure category, 15 milligrams per kilogram per day or more, the hazard ratio soared to 6.98, a nearly sevenfold increase in the likelihood of an optic neuropathy diagnosis.

This dose-dependent gradient is precisely the kind of signal epidemiologists look for when trying to distinguish a genuine drug effect from statistical noise or confounding. If optic neuropathy diagnoses among tuberculosis patients were driven mainly by their underlying illness, their age, or their greater contact with the health care system, one would not necessarily expect risk to scale so cleanly with the milligram-per-kilogram dose of a single medication. The authors argue that the pattern strengthens the case that ethambutol itself is a major driver of the observed nerve damage, a conclusion consistent with decades of smaller clinical reports describing ethambutol-induced optic neuropathy, known in the literature as EON.

The mechanism behind EON has been studied for more than half a century, though it remains incompletely understood. Ethambutol is thought to injure the retinal ganglion cells and the axons of the optic nerve, particularly the small fibers that carry signals from the center of the visual field, which is why patients classically lose color vision and central acuity before they notice broader visual deficits. Zinc chelation and mitochondrial dysfunction have both been proposed as contributing pathways, and the damage often develops insidiously over weeks to months of continuous exposure. What makes the condition clinically treacherous is that it can be irreversible: once the optic nerve fibers degenerate, they do not regenerate, so the only reliable defense is early detection and prompt discontinuation of the drug.

Age emerged as the other dominant risk factor in the Korean data. Patients aged 50 or older faced more than twice the risk of optic neuropathy compared with younger patients, with a hazard ratio of 2.27 and a confidence interval of 1.84 to 2.79. That finding carries real public health weight in a country like South Korea, where the population is aging rapidly and where tuberculosis, though declining, remains concentrated among older adults. Older patients may have reduced renal clearance of the drug, pre-existing subclinical optic nerve vulnerability, or comorbidities such as diabetes and chronic kidney disease that compound the injury. The study adjusted for hypertension, diabetes, and chronic kidney disease among other conditions, yet the age effect persisted, suggesting that aging itself, independent of these measurable diseases, magnifies the eye’s susceptibility to the drug.

Perhaps the most counterintuitive finding in the study is temporal. Even as tuberculosis incidence in Korea steadily declined over the study window, the number of optic neuropathy diagnoses rose markedly after 2009. The authors do not claim that ethambutol alone explains this trend, and claims data cannot fully disentangle why diagnoses increased. Several forces could be at work simultaneously: greater awareness of EON among physicians, expanded access to ophthalmic evaluation, an aging patient population receiving higher cumulative doses, or longer treatment courses for drug-resistant and non-tuberculous mycobacterial infections, for which ethambutol is also widely used. Whatever the mixture of causes, the trend suggests that the burden of drug-associated optic nerve injury is not shrinking in step with the tuberculosis epidemic itself, and may in fact be growing in absolute terms.

The study’s design has strengths and limitations worth weighing. Its scale is a genuine asset: nationwide claims data spanning more than a decade capture a far broader and more representative patient population than any single hospital series, and the propensity-matched control group provides a credible counterfactual for what optic neuropathy rates would look like without tuberculosis or its treatment. On the other hand, administrative claims rely on diagnostic codes from the International Classification of Diseases, tenth revision, rather than on direct ophthalmic examination, so some diagnoses may be misclassified and some cases of subclinical EON may never be coded at all. Exact ethambutol doses and durations recorded in claims may also be imperfect proxies for actual drug exposure. The authors are careful to frame their conclusions in terms of claims-defined optic neuropathy, an honest hedge that does not, however, blunt the central message of a strong dose-response relationship.

What should change in clinical practice? The authors call for strengthened pharmacovigilance and the routine integration of ophthalmic monitoring into tuberculosis management, and the data give that recommendation concrete shape. Patients over 50, those receiving doses at or above 15 milligrams per kilogram per day, and those on prolonged treatment courses would be the natural priority groups for baseline and interval eye examinations, including visual acuity testing, color vision assessment, and where available optical coherence tomography to measure the retinal nerve fiber layer. Clinicians also face a delicate balancing act, because ethambutol remains essential for multidrug regimens and reducing the dose or shortening the course carries its own risks of treatment failure and resistance. The goal is not to abandon the drug but to watch the eyes of the patients most likely to be harmed while the drug does its work against the infection.

The broader lesson extends beyond a single medication. As infectious disease programs succeed in shrinking their target epidemics, the residual patient population tends to be older, sicker, and more susceptible to the toxicities of the very drugs that made the success possible. Tuberculosis is a case in point, but the same dynamic shadows other treatment fields, from antiretroviral therapy to chemotherapy. The Korean cohort is a reminder that the endgame of an epidemic is not only about counting fewer infections; it is about safeguarding the quality of life of the patients who still need treatment. In this case, that means making eye care an explicit, funded, and routine part of tuberculosis therapy, before avoidable and irreversible vision loss becomes the quiet price of a cure.

Subject of Research: Ethambutol-induced optic neuropathy risk among tuberculosis patients in a nationwide Korean cohort

Article Title: Optic neuropathy and ethambutol exposure in a declining tuberculosis population: a nationwide cohort study in Korea

Article References: Yeo, C. D., Kim, J. S., Lee, T.-E., & Lee, H.-J. (2026). Optic neuropathy and ethambutol exposure in a declining tuberculosis population: a nationwide cohort study in Korea. BMC Infectious Diseases. https://doi.org/10.1186/s12879-026-14547-1

Image Credits: AI Generated

DOI: 10.1186/s12879-026-14547-1

Keywords: tuberculosis, ethambutol, optic neuropathy, drug-induced vision loss, pharmacovigilance, ophthalmic monitoring, nationwide cohort study, Korea, dose-response, aging population, National Health Insurance Service, BMC Infectious Diseases

The identification of processed plant foods is one of the most stubborn challenges in archaeobotany. Whole seeds and grains survive charring in recognizable form, preserving the diagnostic shapes of seed coats, embryos, and internal cell structures that allow specialists to assign remains to species. But once ancient cooks crushed, ground, or kneaded their ingredients, that diagnostic architecture was destroyed. What remains after charring is an amorphous lump of fused plant tissue, a feature that archaeologists often record generically as charcoal or food residue and move past. The Yongsan-dong lumps could easily have been dismissed as shapeless burnt debris had the researchers not subjected them to a battery of analytical tests.

Microscopic examination of the lumps revealed that they consisted exclusively of soybean tissue, with no evidence of other plant materials mixed in. This monocultural composition was itself informative. A lump of accidental kitchen waste or general fuel residue would be expected to contain a heterogeneous mixture of plant matter. Instead, the material was uniformly soybean, suggesting deliberate processing of a single ingredient. The researchers then turned to stable isotope analysis, measuring the ratios of carbon-13 to carbon-12 and nitrogen-15 to nitrogen-14 in the charred remains. Carbon isotope values in plants reflect the photosynthetic pathway of the species concerned, and soybean, as a C3 plant with a distinctive isotopic signature, could be distinguished from C4 crops such as millet. Nitrogen isotope values added a further line of evidence, since legumes like soybean fix atmospheric nitrogen through their symbiotic relationship with soil bacteria, giving them characteristically low nitrogen isotope ratios compared with plants that depend on soil nitrogen alone.

Isotopic data alone could not settle the question of how the soybeans had been processed, so the team turned to experiment. Under controlled laboratory conditions, they carbonized whole soybeans as well as soybean-based food products, replicating the charring that occurs when food is accidentally burnt or discarded into a fire. The morphological changes that whole beans undergo during carbonization are well documented: seeds swell, crack, and distort in predictable ways. The ancient lumps did not match the appearance of charred whole beans. Instead, the experimental results indicated that the archaeological material had been shaped into a dough-like form before it was charred, meaning the soybeans had been crushed and reconstituted into a compact mass prior to their encounter with fire.

The closest modern analogue for such a product is meju, the traditional Korean fermented soybean block that serves as the foundation for doenjang, Korea’s fermented soybean paste, and for kanjang, its soy sauce. In the traditional production process, whole soybeans are boiled, crushed, and formed into dense blocks that are then allowed to ferment, during which naturally occurring molds and bacteria break down proteins and generate the deep savory flavors, the umami compounds, that define Korean fermented foods. The researchers are careful to note a crucial limitation: fermentation itself cannot be directly demonstrated in the charred remains. Microbial activity leaves no morphological trace that survives carbonization, and the lumps could in principle represent an unfermented dough product. What the evidence does establish is that the processing step, the transformation of whole beans into compact masses, existed by the early centuries AD.

To test whether the Yongsan-dong lumps were an isolated curiosity or part of a broader pattern, the researchers extended their investigation to similar amorphous remains from four additional archaeological sites on the southern Korean Peninsula. The comparative analysis corroborated the interpretation, suggesting that the practice of processing soybeans into lumps was established across the region as early as AD 200, with related remains continuing into the following centuries. This chronological and geographic spread places the practice squarely within the period of early state formation on the peninsula, the era of the Samhan polities that preceded the Three Kingdoms, when agricultural intensification and social stratification were transforming Korean society.

The functional logic of processing soybeans into compact masses is compelling from the standpoint of food storage. Whole dried soybeans store reasonably well, but they are vulnerable to pests, moisture, and spoilage, and they require lengthy cooking before consumption. Crushing the beans and forming them into dense blocks reduces their volume, concentrates their nutrients, and creates a product that can be stored for extended periods and reconstituted as needed. Fermentation, when it occurs, adds a further preservation benefit by producing acids and antimicrobial compounds that inhibit spoilage organisms, while simultaneously generating the amino acids and flavor compounds that make fermented paste such a potent seasoning. In other words, the same process that kept food edible through lean seasons also made it delicious, a convergence of necessity and pleasure that characterizes many of the world’s great fermented food traditions.

Historical and ethnographic sources enrich this material picture. Early Korean historical texts, including the Samguk Sagi, the twelfth-century history of the Three Kingdoms, contain references to fermented soybean products, and later ethnographic documentation records the central place of jang, the family of fermented soybean condiments, in Korean household economy. Traditional meju production was a domestic activity, typically carried out by households in late autumn, with soybean blocks hung from rafters to ferment over the winter. The archaeological lumps suggest that the technological and culinary knowledge underpinning this tradition was already in place well over a millennium before such documentary records, pushing the deep history of Korean fermented foods back to the early centuries of the Common Era.

The study also speaks to broader questions in the archaeology of food. Soybean is a legume of remarkable nutritional value, rich in protein and, through its biological nitrogen fixation, beneficial to the soils in which it is grown. Archaeobotanical work has traced soybean cultivation in East Asia over thousands of years, but the archaeological record of how ancient peoples transformed the raw bean into food has remained thin, dominated by finds of whole seeds that say little about cuisine. By demonstrating that amorphous charred lumps can be identified to species and assigned to processing stages through the combined application of microscopy, stable isotope analysis, and experimental charring, the researchers offer a methodological template that other archaeobotanists can apply to shapeless plant remains elsewhere in the world.

The social dimensions of the find are equally intriguing. Fermented condiments occupy a special position in Korean foodways, functioning not merely as flavorings but as markers of household identity, seasonal rhythm, and, in stratified societies, status. Previous research on foodways in the ancient Baekje Kingdom has shown that feasting and culinary practice were entangled with social differentiation, and the emergence of a paste-making technology in the early centuries AD may reflect both the agricultural surpluses and the developing tastes of increasingly complex societies. Whether the Yongsan-dong lumps represent everyday household provisioning, communal food preparation, or something more ceremonial cannot be determined from the charred evidence alone. What can be said is that nearly two millennia ago, communities on the southern Korean Peninsula were already manipulating soybeans in ways that their descendants would refine into a culinary tradition that continues to shape Korean identity, and global appetites, today.

Subject of Research: Archaeobotanical identification of processed soybean remains from ancient Korean sites and their implications for legume storage and culinary practices

Article Title: Processed soybean remains from ancient Korean sites: archaeobotanical insights into legume storage and culinary practices

Article References: Kim, M., & Song, G.-S. (2026). Processed soybean remains from ancient Korean sites: archaeobotanical insights into legume storage and culinary practices. Archaeological and Anthropological Sciences, 18(11), Article 213. https://doi.org/10.1007/s12520-026-02580-9

Image Credits: AI Generated

DOI: 10.1007/s12520-026-02580-9

Keywords: soybean, archaeobotany, fermented soybean paste, meju, stable isotope analysis, Korea, food storage, culinary practices, charred plant remains, Yongsan-dong, legume processing, ancient foodways

The retrospective descriptive study, conducted by Mikyung Kim and Dong-jun Choi of the Department of Internal Medicine and the Regional Pharmacovigilance Center for Korean Herbal Medicines, mined the shared adverse event reporting databases of the two hospitals. After removing duplicates, the researchers identified 454 reports in which an herbal medicine was recorded as the suspected agent. That figure represents just 1.2 percent of the 38,367 adverse event reports handled by the centers over the entire study period, a proportion that itself hints at how rarely herbal products are formally flagged as suspected causes of harm even in institutions where they are prescribed routinely.

The most striking finding concerns the regulatory status of the products involved. Non-licensed oral herbal medicines accounted for the largest share of suspected agents at 48.7 percent, narrowly exceeding the 47.0 percent share of oral herbal medicine products licensed by Korea’s Ministry of Food and Drug Safety. At the report level, 51.3 percent of cases involved at least one non-licensed formulation. These are preparations that fall outside the standard regulatory licensing pathway, including individualized herbal decoctions compounded for specific patients, and they are precisely the products that national databases built around licensed pharmaceuticals are least equipped to track.

The clinical profile of the reported events followed recognizable patterns. Gastrointestinal disorders were the most frequently reported system organ class, classified according to the Medical Dictionary for Regulatory Activities, followed by skin and subcutaneous tissue disorders. Among the 572 drug-event pairs with evaluable causality assessments, the overwhelming majority, 87.7 percent, were judged merely possible, while cases assessed as certain were vanishingly rare at 0.2 percent. That distribution reflects a familiar limitation of spontaneous reporting: without rechallenge or unambiguous temporal and biological evidence, causality in herbal medicine cases usually remains provisional, complicated by polypharmacy, delayed onset, and the multi-component nature of herbal formulas.

The surveillance gap emerges most clearly when the researchers compared reports that were forwarded to the national system with those that were not. Overall, 24.0 percent of the 454 reports were never submitted to national pharmacovigilance. The differences between the two groups were stark and statistically significant. Non-submitted reports far more frequently involved non-licensed herbal medicines, at 83.5 percent compared with 41.2 percent of submitted reports. They were far less likely to include documented clinical severity grading, at 7.3 percent versus 59.1 percent, and far less likely to contain a causality assessment, at 26.6 percent versus 98.8 percent, with p values below 0.001 across all three comparisons.

In other words, the reports most likely to slip through the cracks were those describing the products least visible to regulators, and those least complete in the clinical detail that pharmacovigilance assessment depends on. Severity grading in the study followed the Common Terminology Criteria for Adverse Events, the standardized scale used in oncology and increasingly across drug safety work, while causality was evaluated within the framework of individual case safety reports submitted through Korea’s adverse event reporting infrastructure. A report lacking both a severity grade and a causality judgment offers national assessors little to work with, which may partly explain why incomplete cases were not prioritized for submission.

The structural reasons behind the gap are not difficult to infer from the Korean context. Traditional Korean medicine doctors routinely prescribe individualized multi-herb decoctions that are compounded fresh for each patient. These formulations do not carry product licenses in the way manufactured drugs do, so they sit awkwardly within a reporting system whose data structures, coding conventions, and regulatory workflows were designed around licensed medicinal products. A suspected reaction to a ten-herb decoction does not map neatly onto a single product code, and the paper’s authors argue that the current pharmacovigilance framework therefore does not fully capture the range of herbal medicines actually used in real-world Korean practice.

The study’s setting gives its findings particular weight. Dongguk University Ilsan Oriental Hospital hosts a regional pharmacovigilance center specifically dedicated to Korean herbal medicines, one of the institutional mechanisms Korea has built to strengthen reporting from the traditional medicine sector. If, even at a center with dedicated reporting infrastructure, a quarter of herbal adverse event reports failed to reach the national system and half involved non-licensed formulations, the authors suggest that the true blind spots in less specialized settings are likely to be larger. Fifteen years of data also lend temporal depth, spanning a period in which Korea expanded its pharmacovigilance networks and electronic reporting systems considerably.

The methodological caveats are worth noting. This was a single-center retrospective descriptive analysis, so the absolute numbers and proportions cannot be generalized to the whole country, and spontaneous reporting data inherently capture only a fraction of adverse events that actually occur, with underreporting the norm rather than the exception across all drug classes. The study was exempted from full ethical review because it used de-identified data from previously collected reports. Still, the internal comparison between submitted and non-submitted reports is the analytically powerful part of the design, because both groups came from the same institutions over the same period, isolating the characteristics that predict whether a case enters national surveillance.

The authors’ conclusions point toward concrete reforms: broader surveillance coverage that explicitly encompasses non-licensed formulations, improved documentation of clinical severity and causality assessments at the point of reporting, and stronger reporting support for traditional Korean medicine professionals, who are often the first and only clinicians positioned to recognize a herbal adverse event. As herbal medicine use grows globally and integrative care models spread, the Korean experience offers a cautionary lesson for any country attempting to fold traditional formulations into regulatory safety systems built for licensed pharmaceuticals. A safety net with holes in exactly the places where the most-used products fall through is, the study implies, a net that needs reweaving.

Subject of Research: Herbal medicine adverse event reporting and pharmacovigilance surveillance gaps in traditional Korean medicine

Article Title: Real-world patterns of herbal medicine-related adverse event reports and surveillance gaps in national pharmacovigilance: a 15-year retrospective analysis from a single integrative medical center in Korea

Article References: Kim, M., & Choi, D.-J. (2026). Real-world patterns of herbal medicine-related adverse event reports and surveillance gaps in national pharmacovigilance: a 15-year retrospective analysis from a single integrative medical center in Korea. BMC Complementary Medicine and Therapies. https://doi.org/10.1186/s12906-026-05532-x

Image Credits: AI Generated

DOI: 10.1186/s12906-026-05532-x

Keywords: pharmacovigilance, herbal medicine, adverse event reporting, traditional Korean medicine, drug safety, non-licensed formulations, spontaneous reporting, causality assessment, real-world data, Korea, integrative medicine, surveillance gap

School readiness is more than a buzzword. It describes whether a six-year-old can sit still, follow instructions, express needs, play cooperatively, show initiative, and sustain attention long enough to absorb lessons. Decades of research have linked these early capacities to later academic achievement, social well-being, and even adult health outcomes. Children who arrive in the classroom already struggling often face a widening cascade of difficulties, from poor reading scores to behavioral problems, that become progressively harder to reverse. That is why researchers are increasingly treating the years before formal schooling as a critical window for intervention, and why the new Korean study matters far beyond its national borders.

The scale and design of the study set it apart. Rather than sampling a few thousand families, the investigators tapped two national data systems: the Korean National Health Insurance Service, which tracks virtually every resident, and the National Health Screening Program for Infants and Children, which collects developmental information at prescribed ages. Parents completed school readiness questionnaires when their children were between 54 and 60 months old, just before the typical school entry age. Crucially, the team excluded children born prematurely or with low birth weight, as well as those with perinatal complications, sharpening the focus on family income as a variable in otherwise relatively healthy children.

A particularly clever methodological choice strengthened the analysis. Instead of relying on self-reported earnings, which families often misstate, the researchers classified income using the amount of insurance copayments in each child’s birth year. Because Korea’s national insurance system calculates copayments directly from household income, this measure offers an objective, administratively verified proxy for family finances. The cohort was then divided into three groups: a low-income group below the 25th percentile, an intermediate group between the 25th and 75th percentiles, and a high-income group above the 75th percentile. Of the 268,407 children, 76,017, or 28.3 percent, fell into the low-income category, 146,496, or 54.6 percent, into the intermediate group, and 45,894, or 17.1 percent, into the high-income group. Slightly less than half the sample, 49.2 percent, were boys.

The primary outcome was the risk of unreadiness on at least one of six domains measured by the questionnaire: interest in school, ability to play, initiative to do things, ability to concentrate, self-control, and ability to express oneself. After adjusting for confounding factors, children in the low-income group had an adjusted odds ratio of 1.17 for unreadiness in at least one domain compared with the high-income group, with a 95 percent confidence interval of 1.12 to 1.23 and a p-value below 0.001. In plain terms, even after accounting for other influences, growing up in a lower-income household measurably raised the odds that a child would enter school missing at least one foundational skill.

When the researchers drilled down into the individual domains, the pattern held in five of the six. Children from low-income families showed elevated risks of unreadiness across nearly every dimension examined, from sustaining attention to expressing themselves and exercising self-control. This breadth is striking. It suggests that economic disadvantage does not target one narrow skill but instead exerts a diffuse pressure across the whole developmental profile, touching the social, emotional, and cognitive capacities that classrooms assume children will bring with them on day one.

One of the most intriguing findings emerged from the interaction analyses. The association between family income and school unreadiness differed according to whether a child had atopic dermatitis, the chronic inflammatory skin condition commonly known as eczema, with the statistical test for interaction yielding a p-value of 0.043. Atopic dermatitis affects a substantial share of young children and is associated with sleep disturbance, itching, and discomfort, all of which can interfere with concentration and emotional regulation. The result hints that physical health conditions and socioeconomic disadvantage may compound one another, stacking risks in ways that single-factor studies miss. It also raises the possibility that treating common childhood ailments more aggressively in disadvantaged families could partially buffer the developmental toll of poverty.

The authors are careful about what the study can and cannot show. As an observational cohort, it demonstrates association rather than proven causation, and income itself is a stand-in for a web of intertwined factors: parental education, housing quality, nutrition, stress, access to books and enrichment, and time available for interaction. Still, the sheer size of the cohort, the objective income measure, and the exclusion of medically vulnerable children make the income gradient difficult to dismiss as statistical noise. The consistency of the effect across five of six domains reinforces the conclusion that the pattern is real and consequential.

The policy implications are hard to ignore. Korea is a high-income country with universal health insurance and extensive early childhood programs, yet even within this comparatively supportive environment, an income gap in school readiness is clearly visible at the population level. The researchers argue that considerable efforts should be made at the structural level to better prepare preschoolers from lower-income families, framing the issue not as a matter of individual parenting but as a societal responsibility with downstream consequences for academic achievement, social well-being, and future health. Interventions could include expanded access to high-quality preschool, targeted developmental screening in low-income communities, and integrated support that addresses both educational and health-related barriers.

For the global audience, the study offers both a warning and a template. The warning is that socioeconomic disparities in child development emerge early, are detectable before the first day of school, and span multiple domains of functioning, meaning that waiting until children fall behind academically may already be too late. The template is methodological: by linking national insurance records with standardized developmental screening, countries with universal health systems can monitor school readiness at scale and identify where support is needed most. As the researchers conclude, the goal is to ensure that every child, regardless of the household they are born into, arrives at the classroom door equipped to learn, connect, and flourish.

Subject of Research: The association between family income and school readiness in six-year-old children in Korea

Article Title: Influence of family income on school readiness in children: a population-based study in Korea

Article References: Lee, W. S., Kwak, J. H., Kim, J. H., Lee, G. C., Han, B. E., Shin, J., Ha, E., Lee, E., Lee, S., & Han, M. Y. (2026). Influence of family income on school readiness in children: a population-based study in Korea. BMC Pediatrics. https://doi.org/10.1186/s12887-026-07769-4

Image Credits: AI Generated

DOI: 10.1186/s12887-026-07769-4

Keywords: school readiness, family income, child development, pediatrics, health inequality, Korea, cohort study, early childhood education, atopic dermatitis, school readiness questionnaire, population-based study, BMC Pediatrics

The research team, led by Jia Sun of the First Institute of Oceanography under China’s Ministry of Natural Resources, examined tropical cyclone activity across the western North Pacific from 1980 to 2025. This basin is the most active tropical cyclone region on Earth, generating more named storms in an average year than any other ocean basin, and it is the source of nearly every typhoon that threatens eastern China, the Korean Peninsula, and the Japanese archipelago. By tracking where storms formed, the paths they followed, and the points where they made landfall, the researchers assembled one of the most detailed pictures yet of how the region’s coastal hazard landscape is changing.

The central result is a redistribution rather than a simple intensification. South of 20 degrees north latitude, the likelihood that a tropical cyclone would make landfall declined over the study period. North of 30 degrees north, the likelihood increased. That northern band broadly encompasses parts of eastern China, the Korean Peninsula, and Japan, meaning that communities which historically sat at the margins of the typhoon belt are now finding themselves closer to its center of gravity. At the same time, storms have tended to form farther to the northwest, to follow tracks that are both more landward and more poleward, and to move modestly faster along their journeys toward the coast.

One of the most consequential numbers in the study concerns time. The average duration that landfalling cyclones spent over the ocean fell from roughly 5.6 days in the 1980 to 2015 period to about 4.7 days in 2016 to 2025. That difference of nearly a full day may sound abstract, but it has direct operational meaning. A storm that forms closer to shore and races toward the coast more quickly compresses the window available for forecasters to issue warnings, for emergency managers to position resources, and for residents to evacuate or shelter. In densely populated coastal megacities, where evacuation logistics are measured in hours and days, a shortened lead time can translate directly into greater human risk even if the storm itself is no stronger than its predecessors.

Co-corresponding author Guihua Wang of Fudan University emphasized that this changing tempo demands a change in mindset. Preparedness plans, she noted, often lean heavily on past experience, on the assumption that future storms will behave like the ones recorded in historical archives. The new findings show why that assumption is increasingly fragile. Coastal risk assessments and early warning systems, particularly in northern East Asia, must now account for shifting cyclone routes and shrinking travel times, not merely for changes in storm frequency or intensity.

Notably, the study did not detect a significant long-term increase in the maximum intensity that these cyclones achieved. In other words, the strongest storms are not steadily getting stronger in this dataset. That distinction matters for how the risk should be understood and communicated. The evolving threat appears to be driven mainly by where tropical cyclones travel and where they come ashore, rather than by a uniform ramping up of their peak winds. For a coastal planner, this reframes the problem: the question is not only how powerful the next typhoon might be, but where it is increasingly likely to arrive.

What physical mechanisms could be steering storms toward higher latitudes? The researchers point to changes in the large-scale winds over the Pacific, which act as a steering current for tropical cyclones. These environmental flow patterns appear to be guiding more storms on westward and poleward trajectories and toward land. Shifts in the subtropical ridge, the monsoon trough, and the background circulation of the western North Pacific can all alter the preferred corridors along which cyclones move, and the observed trends are consistent with such a steering-driven explanation. The storms are, in effect, being redirected by the atmospheric highways they travel.

The authors are careful, however, not to attribute the entire pattern to long-term climate change. The observed redistribution reflects a combination of forced climate trends and natural climate variability, including multidecadal oscillations in the Pacific system that can redistribute storm activity for years or even decades at a time. Separating the anthropogenic signal from natural swings will require longer observational records and targeted climate model experiments designed to isolate the influence of rising greenhouse gases on steering flows and storm tracks. Until that attribution work matures, the safest interpretation is that the northward shift is real and consequential, even if its ultimate causes remain partly open.

The practical implications for coastal communities are immediate. Populations and infrastructure in southern regions that have long been the traditional focus of typhoon preparedness may face somewhat reduced exposure, while cities and provinces farther north, some of which have comparatively less hardened defenses and less deeply ingrained cyclone cultures, may need to plan for a hazard that was once rare on their doorstep. Building codes, drainage systems, evacuation routes, and insurance models calibrated to historical landfall statistics may all understate the risk now emerging in places like the Korean Peninsula and northern Japan. Yesterday’s tropical cyclone map, as the study’s authors put it, may simply not describe tomorrow’s risk.

As the planet continues to warm, understanding how the geography of tropical cyclone hazard evolves will be essential for protecting hundreds of millions of people along the world’s most storm-exposed coastlines. This study adds a crucial nuance to that picture: the danger is not uniformly growing, but it is moving. For the communities of northern East Asia, the message is to watch not only how strong the next storm may become, but where it is increasingly likely to go, and how much warning time it may leave behind as the risk shifts steadily northward.

Subject of Research: Poleward redistribution of tropical cyclone landfall hazards along East Asian coasts

Article Title: East Asia's tropical cyclone risk is moving steadily north

Article References: East Asia's tropical cyclone risk is moving steadily north. (n.d.). Original publication

Image Credits: AI Generated

DOI: Not provided

Keywords: tropical cyclones, typhoons, East Asia, western North Pacific, landfall, poleward shift, climate change, storm tracks, early warning systems, coastal risk, steering winds, natural variability

The research team, led by investigators at Samsung Medical Center in Seoul, drew on the Korean Nationwide Cancer Public Library Database, a national registry that links cancer diagnoses with prescription records, hospital visits, and death certificates. From this resource they identified 14,736 women newly diagnosed with ovarian or fallopian tube cancer between 2012 and 2019. Because South Korea’s National Health Insurance Service covers virtually the entire population, the database captures an unusually complete picture of real-world medication use, avoiding the recall bias that plagues studies asking patients to remember what they took years earlier.

The investigators classified NSAID exposure in two complementary ways. First, they looked at timing relative to diagnosis: women who filled NSAID prescriptions only within the six months after diagnosis were labeled POST users, while those who used the drugs both before and after diagnosis were labeled PRE and POST users. Second, they measured frequency of use after diagnosis, dividing patients into low users who took NSAIDs less than one day per week, intermediate users taking one to three days per week, and high users taking four or more days per week. This dual classification allowed the team to distinguish whether sustained use around the diagnostic window mattered more than intensity of use afterward.

The biological rationale for the study rests on decades of evidence that inflammation is not merely a symptom of cancer but an active participant in its progression. NSAIDs block cyclooxygenase enzymes, known as COX-1 and COX-2, which convert arachidonic acid into prostaglandins such as prostaglandin E2. In the ovarian tumor microenvironment, prostaglandin E2 has been linked to immune suppression, angiogenesis through vascular endothelial growth factor signaling, and the recruitment of myeloid-derived suppressor cells, all of which can blunt the body’s antitumor defenses and undermine chemotherapy. By dampening these pathways, NSAIDs have shown anticancer effects in other malignancies, including head and neck squamous cell carcinoma, prompting researchers to ask whether the same logic applies to ovarian cancer, a disease notoriously resistant to treatment in its advanced stages.

Over a median follow-up of 2.91 years, 4,108 of the women in the study died, a mortality rate of 27.9 percent. The team used Cox proportional hazards models, the standard statistical framework for survival analysis, adjusting for demographic characteristics, comorbidities measured by the Charlson Comorbidity Index, cancer stage, and treatment-related factors. The results were sobering for those hoping for a simple answer. In the fully adjusted model of the overall cohort, neither the timing of NSAID use nor the frequency of use after diagnosis was significantly associated with all-cause mortality. Women who used NSAIDs both before and after diagnosis had a hazard ratio of 0.94, with a 95 percent confidence interval of 0.88 to 1.01, a range that just crosses the threshold of statistical significance. High-frequency users fared similarly, with a hazard ratio of 0.92 and a confidence interval of 0.82 to 1.04.

But the story changed dramatically when the researchers stratified the cohort by initial treatment sequence, splitting patients into those who received surgery first and those who began with chemotherapy. Among women in the surgery-first group, the associations turned significant. Those who used NSAIDs both before and after diagnosis had a hazard ratio of 0.89, with a confidence interval of 0.82 to 0.97, indicating an eleven percent lower risk of death compared with women who did not. High-frequency users in this subgroup showed an even stronger signal, with a hazard ratio of 0.84 and a confidence interval of 0.73 to 0.98. In the chemotherapy-first subgroup, by contrast, no associations were found at all, regardless of timing or frequency.

Why might surgery-first patients benefit while chemotherapy-first patients show no effect? The authors and observers point to several plausible mechanisms. Surgery itself triggers a profound inflammatory response, releasing cytokines such as tumor necrosis factor-alpha and interleukin-8, and perioperative inflammation is known to suppress tumor-infiltrating lymphocytes, the immune cells that correlate with better outcomes in ovarian cancer. NSAIDs taken around the time of surgery could theoretically blunt this inflammatory surge and preserve antitumor immunity. Patients undergoing chemotherapy first, often those with more advanced or inoperable disease, may represent a biologically different population in which the dominant drivers of mortality are tumor aggressiveness rather than treatment-related inflammation, leaving less room for NSAIDs to matter.

The researchers themselves urge caution, and their language is deliberately restrained. They note that the significant findings in the surgery-first subgroup require cautious interpretation given multiple potential sources of residual confounding. Observational studies of this kind cannot prove causation, and the very fact that NSAID use was associated with benefit in one subgroup but not another raises the possibility of confounding by indication or by underlying health status. Women well enough to undergo primary surgery tend to have earlier-stage disease, better performance status, and different comorbidity profiles than those routed directly to chemotherapy, and even sophisticated statistical adjustment cannot fully erase these differences. Reverse causation is another concern: women with advanced disease may avoid NSAIDs or be prescribed them differently, distorting the apparent relationship between the drugs and survival.

There are also technical limitations inherent to prescription-database research. Over-the-counter NSAID purchases may not be fully captured, meaning some exposure could be misclassified. The study measured all-cause mortality rather than cancer-specific mortality, so deaths from cardiovascular events or other causes dilute any drug-specific signal. The dose and duration of NSAID use were approximated from prescription frequency rather than actual consumption, and the analysis could not distinguish reliably among individual agents, from non-selective NSAIDs such as ibuprofen and naproxen to selective COX-2 inhibitors, each with distinct pharmacology and safety profiles. Supplementary analyses by SEER stage, extent of surgical procedure, and intensive care unit admission were performed to probe the robustness of the findings, but no observational design can eliminate uncertainty entirely.

Still, the scale of the study gives its null and subgroup findings real weight. With nearly fifteen thousand patients drawn from a single-payer national system, this is among the largest investigations of peri-diagnostic NSAID use in ovarian cancer to date, and one of the first in an Asian population, where prior evidence has been sparse. The authors, who declare no competing interests and received no specific funding for the work, emphasize that their results do not support recommending NSAIDs to ovarian cancer patients as a survival intervention. Instead, the surgery-first signal should be viewed as a hypothesis generator, pointing toward randomized or mechanistic studies that could test whether perioperative anti-inflammatory treatment genuinely alters the tumor microenvironment and improves outcomes. Until such evidence arrives, the humble painkillers in nearly every medicine cabinet remain exactly what they have always been for ovarian cancer patients: useful for pain, unproven for survival, and now the subject of a tantalizing question that only further research can answer.

Subject of Research: Peri-diagnostic NSAID use and all-cause mortality in ovarian cancer

Article Title: Peri-diagnostic NSAID use and all-cause mortality in ovarian cancer: nationwide cohort study

Article References: Peri-diagnostic NSAID use and all-cause mortality in ovarian cancer: nationwide cohort study. (n.d.). https://doi.org/10.1186/s13048-026-02278-5

Image Credits: AI Generated

DOI: 10.1186/s13048-026-02278-5

Keywords: ovarian cancer, NSAIDs, all-cause mortality, nationwide cohort, inflammation, COX-2, tumor microenvironment, surgery-first, chemotherapy-first, Korea, survival analysis, epidemiology

The research team, led by Unkyung No of Jeonju University and Sangwon Kim of Hanshin University, drew on nationally representative data from 1,380 Korean high school students, of whom 45.8 percent were female, with an analytic sample of 1,365. Rather than treating gaming onset as a single event, the investigators divided childhood and adolescence into seven onset intervals, ranging from the early elementary years through later adolescence. This design allowed them to ask a deceptively simple question with unusual statistical precision: does it matter when a child starts gaming, and does the answer change depending on which outcome you examine?

Methodologically, the study stands out for its use of a discrete-time survival mediation model estimated with Bayesian techniques in the statistical software Mplus. Survival analysis, a framework long used in medicine to model the timing of disease onset, treats the age at which a child first begins regular gaming as an event whose hazard can be predicted across successive time intervals. By embedding this event-history mediator within a mediation model, the researchers could trace indirect pathways: how a child’s sex or parental digital behaviors influence the timing of gaming onset, and how that timing in turn shapes later smartphone dependence and self-perceived academic standing. The approach reflects a growing methodological literature on mediation analysis with event-history mediators, which the authors note has only recently been formalized for empirical use.

The results reveal a striking asymmetry between the two outcomes. Gaming onset was linked to higher smartphone dependence when gaming began during middle childhood or early adolescence, a period that roughly corresponds to the upper elementary and middle school years. By contrast, early initiation of gaming during the early elementary years was associated with lower self-perceived academic standing in high school. In other words, there is no single danger zone; instead, different developmental windows carry different risks. Children who began gaming in middle childhood or early adolescence were more likely to report problematic patterns of smartphone engagement years later, while those whose gaming started earliest, in the first years of elementary school, were more likely to view their academic performance negatively as teenagers.

The authors are careful to frame smartphone dependence as a developmental vulnerability marker for problematic digital engagement rather than as a clinical diagnosis of Internet gaming disorder. This distinction matters. Internet gaming disorder, recognized in diagnostic frameworks, requires specific symptom patterns, whereas smartphone dependence in this study functions as an early-warning signal, an indicator that a young person’s relationship with digital devices has taken on compulsive characteristics. Framing the outcome this way allows the researchers to study risk pathways in a large representative sample without overextending clinical labels to adolescents who may show elevated vulnerability without meeting diagnostic criteria.

Sex and parental digital behaviors emerged as significant upstream factors, and their associations with gaming onset varied across development. The finding aligns with a substantial body of prior work documenting gender differences in gaming. Studies have repeatedly shown that boys begin gaming earlier and play more intensively than girls, and neuroimaging research has identified gender-related differences in neural responses to gaming cues, suggesting sex-specific vulnerabilities to problematic engagement. The Korean study adds a developmental dimension to this picture: the influence of sex on gaming onset was not uniform across childhood but showed interval-specific patterns, which in turn produced significant interval-specific indirect effects on the downstream outcomes.

Parental behavior, too, proved consequential. Decades of research on parental media mediation have established that how parents regulate, discuss, and model media use shapes children’s engagement with screens, and recent meta-analyses have confirmed that parental mediation is negatively associated with problematic media use among children and adolescents. Studies across multiple countries, including Korea, China, and Malaysia, have shown that parents’ own screen time and technology-related parenting practices predict young children’s screen exposure. The new study extends this literature by connecting parental digital behaviors to the timing of gaming onset, and by showing that this timing mediates later risks. Parents who model heavy device use or provide weak digital guidance, the findings imply, may inadvertently accelerate their children’s entry into gaming during the very windows when onset carries the greatest downstream cost.

The idea that timing matters resonates with research on developmental sensitivity to digital media. A widely cited 2022 analysis in Nature Communications identified windows of developmental sensitivity to social media, showing that the same exposure can have different psychological consequences depending on the age at which it occurs. The parallel work on substance use tells a similar story: age at first alcohol use is a well-established risk factor for later alcohol disorders, and early-onset drug use predicts later dependence problems. The Korean gaming study effectively imports this onset-timing logic into the digital domain, and its results suggest that gaming follows a pattern familiar from addictive behaviors: earlier entry, particularly during sensitive developmental periods, forecasts later difficulty regulating engagement with related technologies.

The connection between gaming onset and self-perceived academic standing deserves particular attention. Academic self-concept, the way students evaluate their own scholastic competence, is known to predict school adjustment, motivation, and long-term achievement, and it begins forming early in elementary school. A randomized controlled study of video-game ownership among young boys found that console ownership was followed by lower academic performance, and longitudinal research has generally found that heavy gaming time modestly jeopardizes educational outcomes. The new findings add nuance: it is not merely how much adolescents play, but whether gaming entered their lives during the early elementary years, when academic identities are still crystallizing, that best predicts a negative view of their school performance in high school.

For policymakers and educators, the practical implications are clear. Anti-addiction regulations, digital literacy curricula, and parental guidance programs are typically deployed as one-size-fits-all measures, but the study’s central message is that interventions should be developmentally timed. Efforts to delay gaming onset and to equip parents with effective mediation strategies may yield the greatest benefit if concentrated in the early elementary years, before academic self-concept hardens, and again in middle childhood and early adolescence, when onset most strongly predicts later smartphone dependence. South Korea, one of the most digitally saturated societies in the world and home to near-universal high-speed internet infrastructure, offers a revealing test case, and national surveys there have documented rising gaming engagement among children and adolescents. As smartphones continue to colonize childhood across the globe, the study’s message travels well beyond Korean borders: the question of when a child’s gaming life begins is not a trivial family scheduling matter, but a developmentally consequential event whose effects ripple through adolescence, shaping both the compulsive pull of the pocket-sized screen and the quiet confidence with which a teenager sits down to study.

Subject of Research: How sex, parental digital behaviors, and the timing of childhood gaming onset relate to smartphone dependence and self-perceived academic standing in adolescence.

Article Title: When Gaming Begins Matters: Sex, Parental Digital Behaviors, and Gaming Onset as a Pathway to Smartphone Dependence and Self-perceived Academic Standing

Article References: When Gaming Begins Matters: Sex, Parental Digital Behaviors, and Gaming Onset as a Pathway to Smartphone Dependence and Self-perceived Academic Standing. (n.d.). https://doi.org/10.1007/s11469-026-01722-3

Image Credits: AI Generated

DOI: 10.1007/s11469-026-01722-3

Keywords: gaming onset, smartphone dependence, parental digital behaviors, sex differences, developmental windows, self-perceived academic standing, adolescents, Korea, survival mediation model, problematic media use, Gaming, Begins