Résumé
BACKGROUND: The high prevalence of obesity, smoking, and physical inactivity in Chile despite government-sponsored measures and campaigns, along with others in the last 30 years, suggests additional reinforcement of these efforts at the primary care level. OBJECTIVES: To determine if lifestyles and modifiable health risk factors in first-year students from the University of Chile Faculties of Medicine and Dentistry, potential future promoters of healthy lifestyles, show changes throughout their first academic year. METHODS: In a randomized stratified sample of 388 students according to sex and chosen career weight, height, waist circumference, waist circumference-weight ratio, food consumption, smoking prevalence and dependence, alcohol use, perceived stress level, and physical activity were measured at the first week, 3 and 6 months after their admission. The Cochrane test assessed dichotomic variables, and the Friedman test was used for nonparametric values. RESULTS: 253 students (186 women) completed the follow-up. A significant worsening of obesity (general and abdominal) and physical inactivity, persistent moderate and high-stress perception, and smoking prevalence were documented throughout the study period. CONCLUSIONS: The progressive obesity and physical inactivity, high-stress perception, and persistent smoking prevalence in the first year of academic life suggest considering measures in the curricular academic structure that facilitate adjustments in the student's lifestyles. Future follow-up of this cohort, increasing participants, and assessing students' mental health are planned.