Background Numerous studies have shown that time spent on television （TV） viewing is positively associated with obesity. The aim of this study was to examine the potential association between excessive TV viewing an...Background Numerous studies have shown that time spent on television （TV） viewing is positively associated with obesity. The aim of this study was to examine the potential association between excessive TV viewing and obesity, especially abdominal obesity, among children and adolescents in mainland of China. Methods A total of 4708 children and adolescents aged 6 to 16 years were recruited for the study. Anthropometric measures were conducted by trained personnels. A self-report questionnaire was designed to gather information on TV time, physical activity, diet habits, maternal body mass index （BMI）, birth weight, and on general demographics, including age and gender, and socio-economic status. Results The prevalence of obesity in this group was 6.5%. Linear regression analysis indicated that high TV viewing time （〉1.5 h/d） was significantly associated with higher BMI, waist circumference （WC）, and waist-to-height ratio （WHtR）. In addition, the high TV time group had 1.3 times the odds of obesity as compared to the low TV time group. Likewise, high TV viewing time increased the OR value 1.32 and 1.21 times higher in WC- and WHtR-defined obesity. Within the non-obesity group, high TV viewing time was also positively associated with higher WC and WHtR. All these correlations remained significant after adjustment for the confounding variables. Conclusions Excessive TV viewing might increase the risk of obesity among Chinese youth. Reducing TV viewing time may be beneficial to improve health outcomes, both in the short- and long term. This finding should be taken into account in future designs of intervention policies to prevent childhood and adolescent obesity in China.展开更多
目的：研究儿童视屏行为和家庭相关因素与儿童体重指数（ body mass index,BMI）的关系,以及家庭相关因素如何通过影响儿童视屏行为而作用于儿童BMI。方法：选择北京市某城区12所小学7~11岁共1846名学生作为研究对象,对学生进行身高、...目的：研究儿童视屏行为和家庭相关因素与儿童体重指数（ body mass index,BMI）的关系,以及家庭相关因素如何通过影响儿童视屏行为而作用于儿童BMI。方法：选择北京市某城区12所小学7~11岁共1846名学生作为研究对象,对学生进行身高、体重测量,计算BMI。通过问卷调查学生的视屏行为时间及其相关的家庭因素。儿童的视屏行为时间是学生回忆过去7 d平均每天看电视/视频的时间和使用电脑/游戏机/iPad的时间。调查可能与儿童视屏行为相关的家庭因素,包括父母的文化程度、职业、视屏行为时间、父母是否告诉儿童视屏行为的不良影响、父母限制儿童视屏行为时间。由父母文化程度和职业计算得到家庭社会经济地位评分。结果：儿童视屏行为时间的中位数为1 h/d,四分位间距为1 h/d。父母限制视屏行为时间〈120 min/d者与父母限制视屏行为时间≥120 min/d者相比,男生BMI降低了1.63 kg/m2（P〈0.001）,女生降低了0.85 kg/m2（P=0.004）。家庭经济地位评分、父母视屏行为时间、父母是否告诉儿童视屏行为的不良影响与儿童的BMI无关。男、女生视屏行为时间在父母限制儿童视屏行为时间和男、女生 BMI 关系的中介效应值分别为-0.222 kg/m2（95%CI：-0.432,-0.095）、-0.187 kg/m2（95%CI：-0.507,-0.049）,中介效应占总效应的比例分别为13.67%、22.11%。结论：父母限制儿童视屏行为时间通过影响儿童视屏行为时间而作用于儿童BMI。家长对儿童的教育对儿童BMI的作用不如家长对儿童行为的监督。所以,在今后儿童肥胖的预防和控制工作中,家长参与监督儿童的行为是必不可少的。展开更多
文摘Background Numerous studies have shown that time spent on television （TV） viewing is positively associated with obesity. The aim of this study was to examine the potential association between excessive TV viewing and obesity, especially abdominal obesity, among children and adolescents in mainland of China. Methods A total of 4708 children and adolescents aged 6 to 16 years were recruited for the study. Anthropometric measures were conducted by trained personnels. A self-report questionnaire was designed to gather information on TV time, physical activity, diet habits, maternal body mass index （BMI）, birth weight, and on general demographics, including age and gender, and socio-economic status. Results The prevalence of obesity in this group was 6.5%. Linear regression analysis indicated that high TV viewing time （〉1.5 h/d） was significantly associated with higher BMI, waist circumference （WC）, and waist-to-height ratio （WHtR）. In addition, the high TV time group had 1.3 times the odds of obesity as compared to the low TV time group. Likewise, high TV viewing time increased the OR value 1.32 and 1.21 times higher in WC- and WHtR-defined obesity. Within the non-obesity group, high TV viewing time was also positively associated with higher WC and WHtR. All these correlations remained significant after adjustment for the confounding variables. Conclusions Excessive TV viewing might increase the risk of obesity among Chinese youth. Reducing TV viewing time may be beneficial to improve health outcomes, both in the short- and long term. This finding should be taken into account in future designs of intervention policies to prevent childhood and adolescent obesity in China.
