Introduction To prevent the young overweight is an important public health issue for healthy growth and the avoidance of future obesity-related diseases. However, the growth pattern varies among individuals, and it is little known whether or not the patterns depend on the weight in early childhood. The objective of this study is to clarify it.
Methods Subjects were 913 students of 15–18 years old (396 males and 517 females) of high schools in three prefectures in 2006–2008. Height and weight at birth, their 1.5, 3, 6, 9, 12 years and the current were obtained with a questionnaire asked to refer to mainly one's maternal and child health handbook. BMI z-score was defined as (one's BMI minus the mean BMI in population) divided by its population SD. Sex-specific latent growth curve models consisting of 2, 3 and 4 groups with up to the third power for the curve fitting were estimated by using seven BMI-scores at the ages, and the relationship of the weight status at birth and 1.5 years old to the curves were tested with the statistical software SAS 9.1.3.
Results Distinguished patterns were found for all the group models in males and only the 2 group model in female. The weight at birth and 1.5 years was significantly related to all the patterns in males, and to only the patterns of the 2 group model in female.
Conclusion The weight in early childhood related to the growth patterns in weight.
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