01-09-2012
Associated Trends in Sedentary Behavior and BMI Among Chinese School Children and Adolescents in Seven Diverse Chinese Provinces
Published in: International Journal of Behavioral Medicine | Issue 3/2012
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Background
Overweight and obesity is becoming a public health concern in China.
Objective
We examined associated trends in sedentary behavior and body mass index (BMI) among school children and adolescents from seven diverse Chinese provinces from 1997 to 2004.
Method
Sequential multiple regressions were conducted with combined cross-sectional data derived from the China Health and Nutrition Survey (N = 5,497) to assess relationships between sedentary behavior and BMI.
Results
Between 1997 and 2004, the amount of time children (6- to 11-year-olds) spent engaging in sedentary behavior increased from 1.71 to 3.14 h/day (p < 0.05), while the amount of time adolescents (12- to 18-year-olds) spent engaging in sedentary behavior increased from 1.71 to 3.50 h/day (p < 0.05). Studying before and after school and watching TV/videos each accounted for about half the increase in sedentary behavior. Both watching TV/videos and studying before and after school were significantly and positively associated with BMI in males, but not in females.
Conclusion
With the growing amount of time Chinese school children and adolescents study outside of school and watch TV/videos, Chinese youth are increasingly likely to become more overweight unless population-based prevention actions are taken.