Ettienne Reynolette, Nigg Claudio R, Li Fenfang, Su Yuhua, McGlone Katalina, Luick Bret, Tachibana Alvin, Carran Christina, Mercado Jobel, Novotny Rachel
University of Hawai'i at Manoa, Department of Human Nutrition, Food, and Animal Sciences, Honolulu, HI (RE, FL, YS, KM, AT, CC, JM, RN).
Hawaii J Med Public Health. 2016 Apr;75(4):95-100.
This study aimed to determine the validity and reliability of the Actical accelerometer for measuring physical activity (PA) in preschool children of mixed ethnicity, compared with direct observation via a modified System for Observing Fitness Instruction Time (SOFIT) protocol and proxy parental reports (PA Logs). Fifty children in Hawai'i wore wrist-mounted accelerometers for two 7-day periods with a washout period between each week. Thirty children were concurrently observed using SOFIT. Parents completed PA Logs for three days. Reliability and validity were measured by intra-class correlation coefficient and proportions of agreement concurrently. There was slight agreement (proportion of agreement: 82%; weighted Kappa=.17, P <.001) between the accelerometer and SOFIT as well as between the accelerometer and the PA Logs (proportions of agreement: 40%; weighted Kappa=0.15, P <.001). PA logs underestimated the PA levels of the children, while the Actical was found to be valid and reliable for estimating PA levels of multiethnic, mixed ethnicity preschoolers. These findings suggest that accelerometers can be objective, valid, and accurate physical activity assessment tools compared to conventional PA logs and subjective reports of activity for preschool children of mixed ethnicity.
本研究旨在确定Actical加速度计在测量多种族学龄前儿童身体活动（PA）方面的有效性和可靠性，并与通过改良的健身指导时间观察系统（SOFIT）协议进行的直接观察以及家长代理报告（PA日志）进行比较。夏威夷的50名儿童佩戴腕式加速度计，为期两个7天周期，每周之间有洗脱期。同时使用SOFIT对30名儿童进行观察。家长完成了为期三天的PA日志。通过组内相关系数和一致性比例同时测量可靠性和有效性。加速度计与SOFIT之间以及加速度计与PA日志之间存在轻微一致性（一致性比例：82%；加权Kappa = 0.17，P < 0.001）（一致性比例：40%；加权Kappa = 0.15，P < 0.001）。PA日志低估了儿童的PA水平，而Actical被发现对于估计多种族、混血学龄前儿童的PA水平是有效且可靠的。这些发现表明，与传统的PA日志和混血学龄前儿童活动的主观报告相比，加速度计可以成为客观、有效且准确的身体活动评估工具。
