Secondhand smoke, sometimes called passive smoke or tobacco smoke pollution, is the mixture of sidestream smoke released from the burning tip of a cigarette and mainstream smoke exhaled by smokers. Decades of epidemiological research have linked it to lung cancer, cardiovascular disease, respiratory infections, and worsened asthma in nonsmokers, with children and pregnant women among the most vulnerable groups. Because nurses are often the health professionals closest to patients and communities, their understanding of these risks has a direct bearing on the advice they give, the environments they help shape, and the prevention messages they deliver. The authors of the new study argue that innovative and engaging educational methods are needed to strengthen this knowledge base among the next generation of nurses.

The study took the form of a quasi-experimental, single-group pre-test and post-test design conducted at a health school in Turkey. A total of 322 nursing students participated. Before the intervention, each student completed a personal information form capturing demographic details such as sex and smoking status, along with a 13-item instrument called the Secondhand Smoke Exposure Knowledge Test. This test served as the study’s primary outcome measure, quantifying how much students knew about the sources, health consequences, and prevention of passive smoking exposure.

The intervention itself was deliberately unconventional. Rather than a lecture or a pamphlet, students attended a 50-minute community-based theater performance titled “Let’s Breathe Clean Air,” which was designed to educate audiences about the risks of passive smoking through dramatized scenarios. Community-based theater, sometimes described as applied theater or drama in health education, works by embedding health messages in narrative, character, and emotion, which proponents argue makes information more memorable and personally resonant than didactic instruction. The performance format also allows large audiences to be reached simultaneously, a practical advantage for crowded nursing programs.

Immediately after the performance, students retook the knowledge test, and the researchers compared the paired scores using the Wilcoxon Signed Ranks test, a non-parametric statistical method appropriate for comparing two related measurements when score distributions may not be normal. The results were striking. The mean knowledge score rose from 9.93, with a standard deviation of 2.4, before the play to 11.98, with a standard deviation of 1.6, afterward. Given that the test contains 13 items, the post-test mean of nearly 12 out of 13 indicates that most students answered almost every knowledge question correctly after the intervention, compared with roughly ten out of 13 beforehand.

The statistical significance of this change was reported at p less than 0.001, meaning the probability of observing such a large improvement by chance alone is extremely small. Equally important was the effect size, a measure of the magnitude of the change that is independent of sample size. The study reported an effect size of 1.00, which by conventional benchmarks in education and psychology is considered a large effect. In practical terms, the theater intervention did not merely nudge scores upward; it produced a substantial and meaningful gain in knowledge across the cohort.

The demographic profile of the participants adds context to the findings. Of the 322 students, 18.6 percent were male and 26.8 percent reported being smokers themselves. That more than a quarter of future nurses smoke is itself a noteworthy data point, since healthcare workers who smoke may face particular challenges in counseling patients about cessation and in advocating for smoke-free environments. The fact that knowledge scores improved significantly across the whole group suggests the theatrical format engaged smokers and nonsmokers alike, although the published analysis focused on the overall pre-post comparison rather than subgroup differences.

The authors are careful about the limits of their design. Because the study included only a single group measured before and after the intervention, with no concurrent control group, it cannot definitively establish that the theater performance alone caused the improvement. Other factors, such as test-retest effects, in which students simply remember and correct their earlier answers, or concurrent learning in their nursing coursework, could have contributed. The researchers explicitly note that the single-group design limits causal conclusions. Nevertheless, the size and consistency of the score increase, combined with the large effect size, support the interpretation that the performance played a meaningful role in enhancing knowledge.

Why might a play outperform more traditional teaching methods? Educational theorists have long argued that emotional engagement strengthens memory consolidation, and dramatization forces abstract health statistics into concrete human situations, such as a child breathing a parent’s smoke at home. Theater also operates simultaneously on cognitive and affective levels, delivering factual content while evoking empathy and prompting reflection about personal and community behavior. For topics like secondhand smoke, where the harm is invisible, delayed, and often inflicted on others rather than the smoker, this affective dimension may be especially valuable. The Turkish team’s results align with a broader movement in health professions education toward interactive, arts-based pedagogy.

The practical implications reach beyond one Turkish health school. The authors recommend incorporating theater-based and other interactive methods into nursing curricula to strengthen public health knowledge, pointing out that such approaches can be valuable and engaging tools for educating large groups at once. If replicated with controlled designs and longer-term follow-up, the approach could offer health schools a low-cost, scalable way to prepare future nurses to protect vulnerable populations from passive smoking. For now, the study offers a vivid demonstration that sometimes the most effective public health lecture comes not from a podium, but from a stage.

Subject of Research: The effect of community-based theater training on nursing students' knowledge of secondhand smoke exposure

Article Title: The effect of community-based theater training on nursing students’ knowledge of secondhand smoke exposure: a one-group pretest–posttest study

Article References: Tok, H. H., Kesgin, M. T., & Uzun, L. N. (2026). The effect of community-based theater training on nursing students’ knowledge of secondhand smoke exposure: a one-group pretest–posttest study. BMC Nursing. https://doi.org/10.1186/s12912-026-04864-w

Image Credits: AI Generated

DOI: 10.1186/s12912-026-04864-w

Keywords: secondhand smoke, nursing students, health education, community-based theater, applied drama, passive smoking, pretest-posttest study, knowledge test, public health, tobacco smoke pollution, nursing curriculum, Turkey

The headline finding is striking: mammographic density, a measure of the amount of fibroglandular tissue visible on a mammogram relative to fatty tissue, accounts for 32.8 percent of the breast cancer burden among Malaysian women. That makes dense breasts the single largest contributor to the country’s breast cancer tally, outweighing every modifiable and hereditary factor examined in the study. The measurement matters because dense tissue both raises cancer risk independently and can mask tumors on mammographic images, complicating early detection in the very screening programs designed to catch the disease.

Among the factors that women and policymakers can actually change, elevated body mass index emerged as the leading contributor, responsible for 14.7 percent of the burden. Passive smoking accounted for another 8 percent. Together, these modifiable risks represent a substantial reservoir of preventable disease, and they respond to interventions ranging from weight management programs to smoke-free environment policies. The emphasis on passive smoking is particularly notable in Malaysia, where direct smoking rates among women have historically been low, but exposure to secondhand smoke in households and public spaces remains common.

Family history and genetic factors, which cannot be altered, collectively contributed 12.1 percent of the breast cancer burden. While this share is smaller than that of mammographic density, it remains clinically significant because inherited risk concentrates in identifiable families, making it a natural target for genetic counseling, testing programs, and intensified surveillance. The figure aligns with a growing body of work showing that hereditary factors, including pathogenic variants in established breast cancer risk genes, play a meaningful role in Asian populations just as they do in European-descended populations.

The methodology behind these estimates reflects a deliberate effort to ground the analysis in Malaysian realities rather than importing figures from Western cohorts. The researchers calculated population attributable risk using Malaysia-specific prevalence data drawn from national surveys, including the National Health and Morbidity Survey, and from local epidemiological studies. For the risk side of the equation, they used relative risks derived from meta-analyses of Asian prospective cohorts and case-control studies rather than relying on estimates from predominantly European populations. This dual commitment to local prevalence and Asian-specific effect sizes distinguishes the study from earlier attributable risk calculations in Japan, China, Korea, and Singapore that informed the broader literature.

Technically, the team estimated attributable proportions using Levin’s formula, a classic epidemiological expression that combines the prevalence of a risk factor in a population with the relative risk it confers. Because risk factors do not act in isolation, the researchers adjusted for the joint effects of multiple factors using a multiplicative model, the standard approach for combining independent risks without double counting. To attach uncertainty to the resulting estimates, they generated simulation-based confidence intervals, a technique that repeatedly resamples from the distributions of prevalence and relative risk to produce a robust range for each attributable fraction. The overall framework echoes the methods used in comparable national assessments, including studies of attributable cancer causes in Japan, Korea, China, and Singapore, but with prevalence inputs tailored specifically to Malaysian women.

One of the most consequential insights from the analysis is how the dominant risk factors shift across the life course. Reproductive factors, such as parity and related hormonal history, play a pronounced role in breast cancer occurring before menopause, whereas elevated body mass index predominates after menopause. This pattern is consistent with the biology of breast cancer. In premenopausal women, adipose tissue contributes relatively little to circulating estrogen compared with the ovaries, so reproductive history exerts a stronger influence. After menopause, when ovarian estrogen production ceases, fat tissue becomes the principal estrogen source, and excess body weight translates into elevated risk. The findings suggest that prevention messages should be age-calibrated: reproductive and lifestyle counseling for younger women, weight-focused interventions for older ones.

Ethnicity adds a further layer of complexity. Malaysia’s population comprises large Malay, Chinese, and Indian communities, and the study found that the impact of individual risk factors varies considerably across these groups. Mammographic density was most influential among Chinese women, while elevated body mass index played a greater role among Malays and Indians. This uneven distribution has practical implications for screening and prevention. Previous work by some of the same research groups has documented ethnic differences in mammographic density patterns across Asian populations, and the new attributable risk estimates translate those biological differences into consequences for the overall disease burden.

The authors argue that these findings support a balanced approach to breast cancer control that combines targeted prevention with risk-based early detection tailored to age and ethnic differences. In practice, that could mean prioritizing weight management and reducing secondhand smoke exposure as public health measures, while also building screening pathways that account for the high prevalence of dense breasts, particularly among Chinese Malaysian women. It also reinforces the case for personalized or risk-stratified screening, an approach championed in international consensus statements such as the ENVISION framework, in which screening intensity and modalities are matched to an individual’s composite risk profile rather than applied uniformly by age alone.

With breast cancer incidence climbing rapidly in Malaysia, the study fills a critical evidence gap. Large prospective studies in high-income countries have long enabled the estimation of preventable cancer cases and guided national cancer control strategies, but locally relevant data have been scarce for Malaysia. By quantifying the population-level contribution of mammographic density, lifestyle, reproductive, and hereditary factors with Malaysian-specific inputs, the research provides health authorities with a prioritized map of where prevention efforts can yield the greatest returns. A notable proportion of the country’s breast cancer burden, the analysis concludes, may be attributable to lifestyle and reproductive factors that are amenable to intervention, while genetic susceptibility and dense breast tissue also contribute importantly, demanding parallel investment in risk-based early detection.

Subject of Research: Population attributable risk of breast cancer from mammographic density, lifestyle, and hereditary factors in Malaysia

Article Title: Attributable breast cancer burden in Malaysia: mammographic density, lifestyle, and hereditary factors

Article References: Ang, B. H., Tai, M.-C., Farid, F. M., Ishak, I. S., Taib, M. F. M., Mariapun, S., Westerhout, C. J., Rahmat, K., Yip, C. H., Taib, N. A. M., Teo, S.-H., & Ho, W.-K. (2026). Attributable breast cancer burden in Malaysia: mammographic density, lifestyle, and hereditary factors. Cancer Causes & Control, 37(10), Article 170. https://doi.org/10.1007/s10552-026-02218-0

Image Credits: AI Generated

DOI: 10.1007/s10552-026-02218-0

Keywords: breast cancer, Malaysia, mammographic density, population attributable risk, body mass index, passive smoking, family history, genetic risk, reproductive factors, ethnic differences, cancer prevention, epidemiology