Objective To assess the association between screen time and obesity among middle school students in Shanghai, and to provide evidence for intervention.
Methods Middle school students aged 9 to 16 years and their parents were recruited by a two-stage sampling technique in Shanghai, 2011. A structured questionnaire was used to collected information on screen time and related risk factors, and a total of 4 196 questionnaires were valid. A nutrition evaluation was conducted based on data from physical examinations. A logistic regression model was developed to determine the contribution of screen time to obesity.
Results Of the 4 196 students investigated, 51.5% students reported extra screen time. Adjusting for age, sex, dietary behavior, sleep, physical activity, birth weight, and the nutritional status of parents, the screen time of students was associated with obesity, and the OR value of obesity in students with normal screen time versus students with extra screen time was 0.779.
Conclusion The extra screen time is associated with obesity. Studies on the risk factors of extra screen time are necessary to inform developing intervention programs in the future.
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