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Table 4 Body composition at 30 years in the 1982 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 30 years Age at Menarche (years) P-valuec
≤11 12–13 ≥14
β (95 % CI)a
Waist circumference (cm) 5.27 1.76 Reference <0.0001*
(3.43; 7.10) (0.18; 3.33)
Abdominal visceral fat layer thickness (cm) 0.51 0.17 Reference <0.001*
(0.23; 0.79) (−0.07; 0.41)
Fat mass index (kg/m2) 2.33 0.56 Reference <0.0001*
(1.64; 3.02) (−0.02; 1.15)
Fat-free mass index (kg/m2) 4.11 1.09 Reference <0.0001*
(2.74; 5.48) (−0.08; 2.26)
BMI (kg/m2) 2.98 0.81 Reference <0.0001*
(2.07; 3.88) (0.03; 1.59)
Overweighta,b 1.5 1.15 Reference <0.0001**
(1.28; 1.75) (0.98; 1.34)
  1. aAdjusted for: maternal pregestational weight, maternal schooling, household score index, family income, birth weight, skin color, and weight for height z-score at 4 years; bPrevalence Ratio (95 % CI); cLinear trend test *Multi-variable regress **Poisson