A research physician used standardized procedures to measure the adolescent’s height (cm) and weight (kg) in duplicate. Body mass index (BMI = kg/m2) at age 16 was evaluated and z-scores were estimated according to the World Health Organization (WHO) 2007 references . Weight status was defined as follows: underweight (BMI-z < −1 SD), normal weight (BMI-z from −1 SD to 1 SD), overweight (BMI-z from 1 SD to <2 SD) and obesity (BMI-z ≥ 2 SD).