Age-Period-Cohort Analysis of Abdominal Obesity in Iranian Children and Adolescents: The CASPIAN Study.

Although the prevalence of abdominal obesity shows considerable fluctuations with increasing age in all assessed periods, an overall trend can be noted for some of them.

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For instance, the prevalence follows a decreasing trend in the 2003 period for boys, while the corresponding trend for girls is increasing.

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The age effect coefficient increased from -2.1 in the age group of 5 - 9 years to 1.1 in the age group of 10 - 14 years and then decreased to 1.0 in the age group of 15 - 19 years among boys; figures followed an increasing trend in girls from -2.2 to 0.8 and 1.5, respectively.

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