Tail-Median Ceiling Reduces Bias in Cox Models With True Exposure Outliers
In survival analysis involving continuous exposures with true outliers, a proposed tail-median ceiling approach outperformed traditional ceiling and median score ...
Tag: Cox proportional hazards model
Low Geriatric Nutritional Risk Index Linked to Higher Postoperative Mortality in Older Adults
A retrospective cohort study found that older adults with a Geriatric Nutritional Risk Index score of 98 or lower had ...
Evaluating Statistical Methods for Sequential Parallel Comparison Designs Under Non-Proportional Hazards
A systematic evaluation shows statistical test performance diverges under non-proportional hazards in sequential parallel comparison clinical trial designs.
Cross-validation choices can quietly reshape which variables Lasso selects in Cox models
A simulation study on real-world data from older adults found that the number of cross-validation folds, stratification and elastic net ...
Standard Survival Model Fails for Ethiopian Colorectal Cancer Data
A retrospective cohort of 161 Ethiopian colorectal cancer patients shows the conventional Cox proportional hazards model violates its core assumption, ...
Older Age and Persistent H. pylori Infection Raise Odds of New Stomach Tumors After Curative Endoscopic Removal of Early Gastric Cancer
A retrospective cohort of 1,200 patients found that older age and persistent Helicobacter pylori infection were independently associated with metachronous ...
High CTI and frailty jointly associated with greater stroke risk
A nationwide cohort study found that high C-reactive protein–triglyceride-glucose index levels and frailty were independently and jointly associated with higher ...
What Keeps Drug Companies Alive? Three Decades of Evidence Distilled
A systematic review of 58 studies published between 1995 and 2024 identifies 63 factors influencing pharmaceutical company survival, finding that ...
New Risk Calculator Predicts Cholesterol Spikes in Diabetes Patients
Researchers in Guangzhou have developed and externally validated a seven-variable nomogram that predicts one-, three-, and five-year risk of LDL-C ...
Rare Nose and Throat Cancer Is Quietly Changing in the United States, Two-Decade Analysis Finds
A two-decade SEER analysis of nearly 9,500 US patients shows nasopharyngeal carcinoma incidence declining modestly while its histologic makeup shifts ...
-
Mothers who receive childcare support from maternal grandparents show more parental warmth, finds NTU Singapore study
-
University of Seville Breaks 120-Year-Old Mystery, Revises a Key Einstein Concept
-
Bee body mass, pathogens and local climate influence heat tolerance
-
Researchers record first-ever images and data of a shark experiencing a boat strike
-
Groundbreaking Clinical Trial Reveals Lubiprostone Enhances Kidney Function
Embark on a thrilling journey of discovery with Scienmag.com—your ultimate source for cutting-edge breakthroughs. Immerse yourself in a world where curiosity knows no limits and tomorrow’s possibilities become today’s reality!