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To analyze the trend of overweight and obesity in students in China during 1985 - 2010.
The data were from Chinese National Survey on Students Constitution and Health in 1985, 1995, 2000, 2005 and 2010, and the sample sizes were 204 977, 216 786, 234 421, 215 319, respectively. BMI was calculated with height and weight. The prevalence of overweight and obesity as well as the rates of increase were described based on the BMI percentile criteria of Working Group on Obesity in China (WGOC).
In 2010, the prevalence of overweight and obesity in four groups students (urban boys, urban girls, rural boys, and rural girls aged 7 - 18 years) were 23.23% (12 503/53 830), 13.76% (7 414/53 857), 12.72% (6 839/53 744), 8.56% (4 612/53 888), respectively, which were higher in boys and urban, and reached the peak 17.14% (18 463/107 741) in students aged 7 - 12 years. The prevalences of obesity were 0.44% (8/1800) - 21.67% (390/1800) among children aged 7 - 18 years in different provinces. The prevalence of overweight and obe