School grade and sex differences in domain-specific sedentary behaviors among Japanese elementary school children: a cross-sectional study.
School grade and sex differences in domain-specific sedentary behaviors among Japanese elementary school children: a cross-sectional study.
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DOI：
10.1186/s12889-017-4221-z
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发表时间：
2017-04-13
影响因子：
4.5
通讯作者：
Oka K
中科院分区：
文献类型：
--
作者：
Ishii K;Shibata A;Adachi M;Mano Y;Oka K
减少儿童久坐行为的比例至关重要。需要了解持续时间和行为背景。本研究探讨了日本小学生在特定领域的久坐时间和屏幕时间指南的一致性的学校年级和性别差异。2010年和2014年，共调查了625名儿童（330名男孩）。使用调查问卷，关于参与者的等级的数据（一至三年级：低年级;四至六年级：高年级），性别，体重和身高，以及每天分别从事每种特定久坐行为的时间。（1）阅读或听音乐，（2）看电视或视频，（3）玩电视游戏，（4）上网（不包括上课），（5）家庭作业，（6）开车旅行。采用双因素协方差分析和logistic回归分析，调整BMI和中度至剧烈体力活动，以检查久坐行为的学校年级和性别差异以及超过推荐的每日总屏幕时间（< 2小时）的独立风险。在625名儿童中，（1）-（6）每周久坐行为的平均分钟（SD）为90.3（123.4）、535.0（356.6）、167.3（222.1）、23.9（70.9）、264.9（185.3）和33.4（61.2），周末分别为42.1（70.0）、323.9（232.0）、123.0（96.4）、15.8（49.9）、74.4（96.4）和71.3（84.9）。2010年和2014年的参与者之间久坐行为的分钟数存在差异;例如，平日和工作日的电视游戏和家庭作业以及周末的汽车旅行。男生在电视游戏使用上的时间较多，女生在阅读、听音乐、做作业、乘车旅行上的时间较多。高年级的学生花更多的时间阅读或听音乐，使用电脑，做作业。高年级学生每天在领域（2）-（4）（屏幕时间）上花费≥2 h的可能性比低年级学生高2.09倍（95%CI：1.32 − 3.30），工作日高2.08倍（95%CI：1.45 − 3.00），周末高1.88倍（95%CI：1.29 − 2.74）。从事每个领域特定的久坐行为所花费的时间根据性别和学校年级而不同。高年级的学生不太可能达到屏幕时间的指导方针。这些发现强调了需要以领域为重点的策略来减少日本学龄儿童的久坐行为。
It is vital to reduce the proportion of sedentary behavior in children. Understanding the duration and behavioral context is needed. The present study examined school-grade and sex differences in domain-specific sedentary times and concurrence with screen-time guidelines among Japanese elementary school children. A total of 625 children (330 boys) were surveyed in 2010 and 2014. Using a questionnaire, data regarding participants’ grade (first through third grades: lower grades; fourth through six grades: higher grades), sex, weight, and height were collected in addition to the time spent per day engaging in each specific sedentary behavior separately: (1) reading or listening to music, (2) TV or video viewing, (3) TV game use, (4) internet use excluding class, (5) homework, and (6) car travel. Two-way analysis of covariance and logistic regression analyses, adjusted for BMI and moderate to vigorous physical activity, were used to examine school-grade and sex differences in sedentary behaviors and the independent risk of exceeding recommended total daily screen time (< 2 h). On 625 children, mean minutes (SD) of sedentary behavior per week in (1) – (6) were 90.3 (123.4), 535.0 (356.6), 167.3 (222.1), 23.9 (70.9), 264.9 (185.3), and 33.4 (61.2) in weekdays and 42.1 (70.0), 323.9 (232.0), 123.0 (96.4), 15.8 (49.9), 74.4 (96.4), and 71.3 (84.9) in weekends, respectively. There were differences in the minutes of sedentary behavior between participants of 2010 and 2014; e.g., TV game use and homework in weekdays and weekdays and car travel in weekends. Boys spent more time in TV game use, and girls spent more time reading, listening to music, doing homework, and car travel. Higher-grade students spent more time reading or listening to music, using a computer, and doing homework. Higher-grade students were 2.09 times (95% CI: 1.32 − 3.30) in whole week, 2.08 times (95% CI: 1.45 − 3.00) in weekday, and 1.88 times (95% CI: 1.29 − 2.74) in weekend more likely to spend ≥2 h per day in domains (2) − (4) (screen-time) than lower-grade students. Time spent engaging in each domain-specific sedentary behavior differed according to sex and school grade. Higher-grade students were less likely to meet screen-time guidelines. These findings highlight the need for domain-focused strategies to decrease sedentary behavior in Japanese school-age children.