Department of Health & Rehabilitation Sciences, College of Public Health, Temple University, 1301 Cecil B. Moore Avenue, Room 634, Philadelphia, PA 19122 (USA).
Health and Rehabilitation Sciences, Temple University.
Phys Ther. 2020 Aug 12;100(8):1393-1410. doi: 10.1093/ptj/pzaa074.
The purpose of this study was to develop self-report and parent-proxy measures of children's physical activity for clinical research and practice and to demonstrate a valid and reliable instrument of children's lived experience of physical activity as reported by the children themselves or their parent proxies.
This study involved qualitative development of item pools followed by 2 cross-sectional validity and reliability studies. The National Institutes of Health Patient Reported Outcome Measurement Information System (PROMIS) instrument development standards were applied to create child self-report and parent-proxy physical activity instruments from previously developed, content-valid pools of physical activity items. Each item used a 7-day recall period and had 5 response options. Item bank calibration was based on national samples totaling 3033 children aged 8 to 17 years and 2336 parents of children aged 5 to 17 years. Quantitative analyses included reliability assessments, factor analyses, item response theory calibration, differential item functioning, and construct validation.
The final item banks comprised 10 items each. The items were selected based on content and psychometric properties. The item banks appeared to be unidimensional and free from differential item functioning. They showed excellent reliability and a high degree of precision across the range of the latent variable. Child-report and parent-proxy 4- and 8-item fixed-length instruments were specified. The instruments showed moderate correlation with existing self-report measures of physical activity.
The PROMIS Pediatric Physical Activity instruments provide precise and valid measurement of children's lived experiences of physical activity.
The availability of the PROMIS Pediatric Physical Activity instruments will support advances in clinical practice and research that require measurement of pediatric physical activity by self- and parent-proxy report.
本研究旨在开发儿童身体活动的自我报告和家长代理测量工具，用于临床研究和实践，并展示一种经过验证和可靠的儿童身体活动体验工具，由儿童本人或其家长代理报告。
本研究涉及定性的项目池开发，随后进行了 2 项横断面有效性和可靠性研究。国家卫生研究院患者报告结局测量信息系统（PROMIS）工具开发标准被用于从先前开发的具有内容有效性的身体活动项目池中创建儿童自我报告和家长代理身体活动工具。每个项目都使用 7 天的回忆期，有 5 个回答选项。项目库校准基于全国共 3033 名 8 至 17 岁儿童和 2336 名 5 至 17 岁儿童的家长的样本。定量分析包括可靠性评估、因素分析、项目反应理论校准、差异项目功能和结构验证。
最终的项目库各包含 10 个项目。这些项目是根据内容和心理测量学特性选择的。项目库似乎是单维的，不存在差异项目功能。它们在潜在变量的整个范围内表现出极好的可靠性和高度的精确性。指定了儿童报告和家长代理的 4 项和 8 项固定长度工具。这些工具与现有的身体活动自我报告测量工具具有中等相关性。
PROMIS 儿科身体活动工具提供了对儿童身体活动体验的精确和有效的测量。
PROMIS 儿科身体活动工具的可用性将支持需要通过自我和家长代理报告来测量儿童身体活动的临床实践和研究的进展。
