Insulin resistance and associated factors in female adolescents from two capital cities in the north and south of Brazil.

Background: It has been described that physiological changes in glucose metabolism, represented by insulin resistance (IR), are predicted during pubertal evolution, and obesity may be associated with its persistence even at the end of puberty. The aim of this study was to investigate the prevalence of IR in female adolescents with possible associated factors and evaluate the relationship of time since menarche (< 2 vs. ≥ 2 years) in the occurrence of IR in two Brazilian capital cities: Porto Velho (RO) and Porto Alegre (RS).

INACTIVE BEHAVIOR IN ADOLESCENT STUDENTS OF THE BRAZILIAN WESTERN AMAZON.

Objective: To identify the prevalence of physical inactivity in adolescent students in the city of Porto Velho, RO, Northern Brazil, and its associated factors.

Methods: School-based study, conducted with 2,694 adolescents. The self-reported variable for outcome was physical inactivity.

Association of body composition and age at menarche in girls and adolescents in the Brazilian Legal Amazon.

Objective: To analyze the association between age at menarche and variables of body composition in girls from the Northern region of Brazil, the Brazilian Legal Amazon.

Method: The sample was composed of 926 school girls, aged between 8 and 18 years, divided into two groups, those who had (G1; n=727; 72.5%) and had not undergone menarche (G2; n=199; 21.

Age at Menarche and Its Association with Excess Weight and Body Fat Percentage in Girls in the Southwestern Region of the Brazilian Amazon.

Study Objective: To analyze age at menarche and its association with excess weight and body fat percentage.

Design: School-based cross-sectional survey.

Setting: Southwestern region of the Brazilian Amazon.