Lifestyle and Life Satisfaction Among First-Year Medical Students at Tehran University of Medical Sciences (TUMS), 2024–2025

This dataset contains baseline survey data collected as part of an ongoing three-year prospective cohort study investigating lifestyle characteristics and non-communicable disease (NCD) risk factors among first-year students at Tehran University of Medical Sciences (TUMS), Iran. The present dataset corresponds to Phase 1 (baseline assessment) and was collected between December 4, 2024, and February 19, 2025. Data were obtained through standardized self-administered questionnaires completed by newly enrolled students aged 18 years and older who provided written informed consent. The dataset includes information on: Demographic characteristics (age, sex, marital status, residence, field of study, parental education, and socioeconomic status) Dietary habits Physical activity Tobacco use and passive smoking exposure Alcohol consumption Sleep quality Anxiety symptoms Life satisfaction Lifestyle behaviors were combined to generate a composite lifestyle score ranging from 0 to 8, reflecting overall health-related behaviors. Life satisfaction was assessed using the Satisfaction with Life Scale (SWLS). Physical activity was measured using a modified Global Physical Activity Questionnaire (GPAQ-v2), sleep quality was assessed using the Pittsburgh Sleep Quality Index (PSQI), and anxiety symptoms were measured using the Generalized Anxiety Disorder-7 (GAD-7) scale. A total of 422 students participated in the baseline survey. Among them, 419 completed the life satisfaction questionnaire. For the final analytical models, participants with missing values in key independent variables were excluded, resulting in an analytical sample of 344 individuals. The primary objective of the associated study was to examine the relationship between lifestyle behaviors and life satisfaction among university students. Statistical analyses included descriptive statistics, chi-square tests, and multivariable logistic regression models adjusted for age, sex, socioeconomic status, and anxiety symptoms.Keywords: Lifestyle behaviors; Life satisfaction; First-year university students; Iran