The relationships between stature, fat-free mass index, and fat mass index at before and after BMI-rebound in children

OBJECTIVE: The beginning of the post-infancy rise in the body mass index (BMI, kg/m2) has been termed the BMI-rebound (or adiposity rebound), and the fat-free mass index (FFMI=fat-free mass/stature2, kg/m2) and fat mass index (FMI=fat mass/stature2, kg/m2) are concepts comparable to that of BMI. We examined whether the relation of stature to FFMI and FMI, respectively, is independent of childhood BMI-rebound. DESIGN:' Cross-sectional study. SUBJECTS: A total of 752 apparently healthy children in Japan (337 boys and 415 girls),varying in age from 3 to 8 yrs. MEASUREMENTS AND METHODS: Stature and body mass were measured, and body composition was assessed by bioelectrical impedance analysis (BIA). Fat-free mass (FFM) and fat mass (FM) were both adjusted for stature to give FFMI and FMI. RESULTS: The relationship between BMI and O/oFM was linear for boys (r =O.610; p更多