To investigate the tracking of body mass index (BMI) during childhood. The effect of birth weight and family history of obesity on BMI development during childhood was also evaluated.
All children born during 1981-1982 in a rural community of eastern Finland were followed at ages 6 months, 7 and 15 y (-6 m, -7y, -15y). Out of 205 children, 138 completed the full follow-up period, of which 100 (45 girls) were included in the analysis with complete data.
BMI-6 m was significantly associated with BMI-7y (r=0.320; P-value=0.001), but no longer with BMI-15y. BMI-7y was significantly associated with BMI-15y (r=0.686; P-value