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Table 5 Regression of the body composition variables at 18 years in the 1993 Pelotas birth cohort according to categories of age at menarche

From: Impact of the age at menarche on body composition in adulthood: results from two birth cohort studies

Variables at 18 years Confounding factor adjustmenta Confounding factor adjustmenta + BMIc at 11 years Confounding factor adjustmenta Confounding factor adjustmenta + BMIc at 11 years Reference
β (95 % CI)
Age at Menarche (years)
≤11 12–13 ≥14
Waist circumference (cm) 5.1 0.13 2.74 0.34 -
(3.4; 6.3) (−0.85; 1.1) (1.7; 3.8) (−0.51; 1.2)  
Fat mass index (kg/m2) 2.2 0.26 1.2 0.26 -
(1.7; 2.6) (−0.08; 0.60) (0.78; 1.6) (−0.04; 0.55)  
Fat-free mass index (kg/m2) 0.39 −0.24 0.24 −0.07 -
(0.20; 0.58) (−0.41; −0.07) (0.07; 0.41) (−0.22; 0.08)  
BMI (kg/m2) 2.8 0.13 1.5 0.20 -
(2.2; 3.4) (−0.31; 0.56) (0.97; 2.0) (−0.18; 0.58)  
Overweighta,b 2.2 1.2 1.7 1.2 -
(1.7; 2.7) (0.93; 1.4) (1.3; 2.1) (0.97–1.4)  
  1. aAdjustment for confounding factors: maternal pregestational weight, maternal schooling, household score index (18 years of age), family income at birth, birth weight, and skin color (11 years of age); bPrevalence Ratio (95 % CI); cBMI z-score at 11 years