基于屏幕的久坐行为与儿童肥胖：国际儿童肥胖研究、生活方式与环境（ISCOLE）-肯尼亚的研究结果。
Screen-based sedentary behaviour and adiposity among school children: Results from International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE) - Kenya.
机构信息
Department of Physical and Health Education, Kenyatta University, Nairobi, Kenya.
African Population and Health Research Center, Nairobi, Kenya.
出版信息
PLoS One. 2018 Jun 28;13(6):e0199790. doi: 10.1371/journal.pone.0199790. eCollection 2018.
BACKGROUND
High levels of sedentary behaviours have been independently associated with several negative health indicators, including obesity. Screen time (ST) is often used as a contributing measure of sedentary time. It is recommended that children spend no more than 2 hours on recreational sedentary screen-based activities daily. We describe screen-based sedentary time of urban school children and examine the associations between body mass index (BMI) and percent Body Fat (%BF) with ST levels.
METHODS
Data were collected from 563 children aged 9 to 11 years attending 29 non-boarding primary schools in Nairobi, Kenya, as part of the International Study of Childhood Obesity, Lifestyle and the Environment (ISCOLE). Data were analysed to test for associations between ST and sex, type of school attended (public verses private), Socioeconomic status, adiposity, and access to electronic devices. We also assessed participants' ST on school and weekend days.
RESULTS
Of the participants recruited, 15.5% had high ST levels, 67.9% spent no more than 2 hours in recreational screen activities on school days while 74.2% did not meet the guidelines on weekend days. Participants sex was associated with daily ST (t = 3.5, p<0.001), ST on the weekend (t = 3.9, p <0.001) and total ST per week (t = 3.5, p<0.001) with males having higher ST than females. ST was associated with type of school for daily ST (t = 3.6, p <0.001), ST on the weekend (t = 4.5, p<0.001) and total ST per week (t = 3.6, p<0.001) where private schools pupils had higher ST. ST was not associated with BMI. ST was not associated with %BF except on weekend days (p = 0.038) where those classified as overfat/obese (fat) had higher ST.
CONCLUSIONS
A large proportion of children spend more time than recommended on screen activities particularly on weekend days. Strategies to improve healthy living should focus on the reduction of sedentary ST for school-aged children.
背景
久坐行为水平较高与多种负面健康指标有关，包括肥胖。屏幕时间（ST）通常被用作久坐时间的衡量指标。建议儿童每天进行娱乐性久坐的屏幕活动不超过 2 小时。我们描述了城市学童的基于屏幕的久坐时间，并研究了身体质量指数（BMI）和体脂肪百分比（%BF）与 ST 水平之间的关联。
方法
数据来自肯尼亚内罗毕的 29 所非寄宿制小学的 563 名 9 至 11 岁的儿童，这些儿童是儿童肥胖、生活方式和环境国际研究（ISCOLE）的一部分。对数据进行了分析，以检验 ST 与性别、所上学校类型（公立与私立）、社会经济地位、肥胖程度以及是否接触电子设备之间的关联。我们还评估了参与者在上学日和周末的 ST。
结果
在所招募的参与者中，15.5%的人 ST 水平较高，67.9%的人在上学日没有超过 2 小时的娱乐性屏幕活动，而 74.2%的人在周末没有达到规定的标准。参与者的性别与每日 ST（t = 3.5，p<0.001）、周末 ST（t = 3.9，p <0.001）和每周总 ST（t = 3.5，p<0.001）有关，男性的 ST 高于女性。ST 与上学日的学校类型有关（t = 3.6，p <0.001）、周末 ST（t = 4.5，p<0.001）和每周总 ST（t = 3.6，p<0.001），私立学校的学生 ST 较高。ST 与 BMI 无关。ST 与 %BF 无关，但在周末（p = 0.038）除外，在周末，被归类为超重/肥胖（肥胖）的人 ST 较高。
结论
很大一部分儿童花在屏幕活动上的时间超过了推荐时间，尤其是在周末。改善健康生活的策略应侧重于减少学龄儿童的久坐 ST。
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