Xue Hongmei, Tian Guo, Duan Ruonan, Quan Liming, Zhao Li, Yang Min, Libuda Lars, Muckelbauer Rebecca, Cheng Guo
Department of Nutrition, Food Safety and Toxicology, West China School of Public Health, Sichuan University, Chengdu 610041, China.
Department of Clinical Nutrition, Jincheng People's Hospital, Jincheng 048026, China.
Nutrients. 2016 Oct 25;8(11):667. doi: 10.3390/nu8110667.
We aim to explore the independent associations of sedentary behaviors (SB) with body mass distribution among Chinese children. Data on the screen-based sedentary time (television viewing and computer use) and doing homework, physical activities and dietary intake of 1586 Chinese children (50.3% girls) aged 7-15 years were obtained through validated questionnaires. Skin-fold thickness, body height, and weight were measured to calculate percent body fat (%BF), fat mass index (FMI), and fat-free mass index (FFMI). Parental characteristics were collected by questionnaires. Among girls, time of SB (screen time or doing homework) was positively related to %BF, FMI, and FFMI ( < 0.03) after adjusting for maternal overweight, the average annual income of family, moderate-to-vigorous physical activity energy expenditure, and energy intake: Girls in the highest tertile of screen time/homework had 16.7%/23.3% higher relative FMI and 2.9%/2.9% higher relative FFMI than girls in the lowest tertile. Among boys, screen time was positively associated with FFMI ( < 0.003), but not related to %BF and FMI ( > 0.09), while time of doing homework was positively related to %BF and FMI ( = 0.03). Sedentary behaviors might be positively and independently related to fat mass among Chinese children, and were more pronounced in girls.
我们旨在探讨中国儿童久坐行为（SB）与身体质量分布之间的独立关联。通过经过验证的问卷，收集了1586名7至15岁中国儿童（50.3%为女孩）基于屏幕的久坐时间（看电视和使用电脑）、做作业、体育活动及饮食摄入的数据。测量皮褶厚度、身高和体重，以计算体脂百分比（%BF）、脂肪量指数（FMI）和去脂体重指数（FFMI）。通过问卷收集父母的特征信息。在女孩中，在调整了母亲超重、家庭年均收入、中等到剧烈体育活动能量消耗和能量摄入后，SB时间（屏幕时间或做作业时间）与%BF、FMI和FFMI呈正相关（<0.03）：屏幕时间/做作业时间处于最高三分位数的女孩，其相对FMI比处于最低三分位数的女孩高16.7%/23.3%，相对FFMI高2.9%/2.9%。在男孩中，屏幕时间与FFMI呈正相关（<0.003），但与%BF和FMI无关（>0.09），而做作业时间与%BF和FMI呈正相关（=0.03）。久坐行为可能与中国儿童的脂肪量呈正相关且独立相关，在女孩中更为明显。
