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Socio-environmental correlates of physical activity and sedentary behaviors in primary schoolchildren in Hong Kong.

机译：香港小学生体育活动与久坐行为的社会环境相关性。

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摘要

The first study (Chapter 3) examined the reliability and validity of the modified Children's Leisure Activities Study Survey (CLASS) questionnaire in assessing physical activity and sedentary behavior of the Hong Kong Chinese children. The modified Chinese questionnaire (CLASS-C) consisted of a checklist of 31 physical activities and 13 sedentary pursuits. The test-retest reliability of the questionnaire was examined in 84 boys and 136 girls aged 9 to 14 years by the comparison of data from the two survey administrations carried out one week apart. Intraclass correlation coefficients (ICCs) were analyzed to determine consistency in results. A sub-sample of 139 children completed the 7-day accelerometer protocol. The validity of the questionnaire was determined by comparing data from the second administration with the accelerometer estimates of moderate- and/or vigorous-intensity physical activity. Bland-Altman plots were performed to further examine the agreement of the two methods. Acceptable reliability was found in self-reported time in moderate-to-vigorous physical activity (MVPA) (ICC = 0.71, 95%CI: 0.61-0.77) and in the sedentary behaviors (ICC = 0.69, 95%CI: 0.59-0.77). Self-reported estimate in daily MVPA was moderately correlated with minutes assessed by the accelerometer (girls: r = 0.48, P<0.05; boys: r = 0.27, P>0.05). Bland-Altman plots showed that self-reports of vigorous physical activity were higher than those assessed by the accelerometer.;The second study (Chapter 4) developed an instrument based on the social ecological model to evaluate the socio-environmental correlates of the children's physical activity and sedentary behavior. The instrument consisted of segments that incorporated reports from both the children and their parents. Children were asked about intrapersonal factors and perceived environments at home and in the neighborhood. Corresponding parents reported demographic information (age, education, occupation, income, and weight status), their physical activity and sedentary behavior habits, the control on their child's sedentary behavior, and perception of physical environment in the neighborhood. The questionnaires were administrated in a group of 160 primary schoolchildren aged 10 to 14 years and their parents on two occasions with 8 to 10 days apart. The test-retest reliability of each individual item was determined using percent agreement and kappa statistics for the categorical variables and intraclass correlation coefficients (ICCs) for the continuous variables. The overall missing rates were 2.5% to 5.6% for children- and parent-reported items. The ICC values for continuous variables in children-reported individual and familial factors ranged from 0.66 to 0.79. For self-reported categorical variables, kappa values ranged from 0.27 to 0.76, and an percent agreement statistics were greater than 80%. Meanwhile, reliability statistics for parent-reported home and environment variables showed acceptable consistency with most of the ICC values greater than 0.70.;The third study (Chapter 5) aimed to investigate the physical activity and sedentary behavior patterns among a sample of 1013 primary 4-6 schoolchildren using the CLASS-C questionnaire. The individual, social and physical environmental correlates of the activity behaviors were investigated through a sub-sample of 303 children, whose habitual activity was objectively assessed by ActiGraph accelerometer, in addition to subjective measures by the CLASS-C questionnaire. The multiple correlates of activity behavior for the children in the sub-sample group were assessed using the environmental correlates questionnaire which was developed in Study II. Cluster analyses were used to group children with similar activity patterns. Hierarchical regression analyses were performed to assess the associations of the multiple variables with activity behaviors. Approximately half of the children did not reach the recommended physical activity level and one fifth of them engaged in excessive TV viewing of 2 hr every day. Cluster analysis identifies 5 clusters of children who shared similar patterns of physical activity and sedentary behaviors. Hierarchical regression analyses showed that participation in school sports team and having higher self-efficacy was positively associated with self-reports in MVPA in boys after controlling age, body mass index (BMI), and parental education. Girls who reported participation in school sports team and perceived the availability of more sports facilities at home self-reported more time spent in MVPA after controlling socio-demographic variables. Perception of parental support on physical activity was positively correlated with accelerometer-assessed MVPA among girls, while it was inversely associated with sedentary behaviors in boys. Residence density was positively associated with boys' sedentary behaviors, while girls whose parents reported more safety concerns on neighborhood environment were more likely to be sedentary. (Abstract shortened by UMI.).
机译：第一项研究（第3章）检验了修改后的儿童休闲活动研究调查表（CLASS）在评估中国香港儿童的身体活动和久坐行为方面的可靠性和有效性。修改后的中文问卷（CLASS-C）包含31种体育锻炼和13项久坐不动的追踪清单。通过比较两个调查部门隔一周进行的数据比较，对84名9至14岁的男孩和136名女孩的问卷进行了重测信度的检验。分析类内相关系数（ICC）以确定结果的一致性。 139名儿童的子样本完成了为期7天的加速度计规程。通过将第二次给药的数据与加速度计对中等强度和/或剧烈强度体育活动的估计值进行比较，确定问卷的有效性。进行了Bland-Altman绘图，以进一步检验这两种方法的一致性。在中度到剧烈运动（MVPA）（ICC = 0.71，95％CI：0.61-0.77）和久坐行为（ICC = 0.69，95％CI：0.59-0.77）的自我报告时间中发现可接受的可靠性）。自我报告的每日MVPA估计值与通过加速度计评估的分钟数呈中等相关性（女孩：r = 0.48，P <0.05；男孩：r = 0.27，P> 0.05）。 Bland-Altman图表明，剧烈运动的自我报告要比用加速度计评估的要高。第二项研究（第4章）开发了一种基于社会生态模型的仪器，用于评估儿童生理状况的社会环境相关性。活动和久坐行为。该工具包括合并了孩子及其父母的报告的部分。向儿童询问有关家庭内和附近的人际关系因素和感知环境的信息。相应的父母报告了人口统计信息（年龄，教育程度，职业，收入和体重状况），他们的身体活动和久坐行为习惯，对孩子久坐行为的控制以及对邻里身体环境的感知。问卷是在160位10至14岁的小学生及其父母中进行的，每组两次，相隔8至10天。使用分类变量的一致性百分比和Kappa统计量以及连续变量的类内相关系数（ICC），确定每个单独项目的重测可靠性。儿童和父母举报的物品的总体漏失率为2.5％至5.6％。儿童报告的个人和家庭因素中连续变量的ICC值范围为0.66至0.79。对于自我报告的分类变量，kappa值在0.27到0.76之间，并且协议统计的百分比大于80％。同时，父母报告的家庭和环境变量的可靠性统计数据显示出可接受的一致性，且大多数ICC值均大于0.70 .;第三项研究（第5章）旨在调查1013名小学4样本中的身体活动和久坐行为模式-6个使用CLASS-C问卷的学童。通过对303名儿童的子样本进行调查，研究其活动行为的个人，社会和身体环境相关性，除了通过CLASS-C问卷进行主观测量外，还通过ActiGraph加速度计客观评估了他们的习惯性活动。使用研究II中开发的环境相关调查表评估了子样本组儿童活动行为的多重相关性。聚类分析用于将具有相似活动模式的儿童分组。进行了层次回归分析，以评估多个变量与活动行为的关联。大约一半的孩子没有达到建议的体育锻炼水平，其中五分之一的孩子每天看电视时间超过2小时。聚类分析确定了5个聚类的儿童，他们具有相似的体育活动和久坐行为模式。分层回归分析显示，在控制年龄，体重指数（BMI）和父母教育后，男孩参加学校运动队和具有较高的自我效能感与MVPA的自我报告呈正相关。报告了参加学校运动队并感觉到家里有更多运动设施的女孩，自我报告称，在控制了社会人口统计学变量后，他们在MVPA上花费了更多时间。父母对身体活动的支持感与加速计评估的MVPA呈正相关，而与男孩的久坐行为呈负相关。居住密度与男孩的久坐行为呈正相关，而父母报告邻里环境安全问题更多的女孩则久坐不动。 （摘要由UMI缩短。）。

著录项

  • 作者

    Huang, Ya Jun.;

  • 作者单位

    The Chinese University of Hong Kong (Hong Kong).;

  • 授予单位 The Chinese University of Hong Kong (Hong Kong).;
  • 学科 Education Physical.;Health Sciences Public Health.;Education Elementary.
  • 学位 Ph.D.
  • 年度 2008
  • 页码 196 p.
  • 总页数 196
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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