Pattern of sex differences in growth of Saudi children and adolescents.
2010
Abstract Background: Although variations in growth between boys and
girlshave been reported, detailed descriptions according to age and growth parameters are not available. Objective: The goal of this study was to determine the pattern and magnitude of differences in growth between boys and
girlsaccording to age that justify separate
growth charts. Methods: The data set was based on a cross-sectional representative sample of the Saudi population of healthy children and adolescents from birth to 19 years of age. Body measurements (length, height, weight, and head circumference) were performed according to standard recommendations; body mass index was also determined for each subject. The difference in growth between boys and
girlswas assessed based on z scores and percentiles (5th, 50th, and 95th) of growth parameters using 2 age groups (0–3 years and 2–19 years). The significance of the difference between boys and
girlsfor any growth parameter was tested by ANCOVA. Results: A total of 35,279 children and adolescents from birth to 19 years of age satisfied the criteria for growth measurements. There were 17,880 boys and 17,399
girls; all were Saudi nationals. The Saudi boys were generally taller and heavier than
girlsup to ~7 to 10 years of age. Thereafter,
girlsgenerally were taller and heavier than boys from 10 to 14–15 years of age. After that, boys again were taller and heavier. Similar variations were observed for body mass index and head circumference. The difference between boys and
girlsfor each growth parameter was highly significant ( P Conclusions: Based on analysis of these Saudi children and adolescents, the difference in growth between boys and
girlswas not uniform but depended on age. However, the pattern was remarkably consistent across all growth parameters and appears to reflect the timing of maturation between boys and
girls.
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