O'Connor Teresia M, Cerin Ester, Robles Jessica, Lee Rebecca E, Kerr Jacqueline, Butte Nancy, Mendoza Jason A, Thompson Deborah, Baranowski Tom
USDA/ARS Children's Nutrition Research Center, Pediatrics, Baylor College of Medicine, Houston, TX 77030 USA.
Geospat Health. 2013 May;7(2):375-80. doi: 10.4081/gh.2013.94.
Both physical and social environmental factors influence young children's physical activity, yet little is known about where Hispanic children are more likely to be active. We assessed the feasibility of simultaneously measuring, then processing objective measures of location and physical activity among Hispanic preschool children. Preschool-aged Hispanic children (n = 15) simultaneously wore QStarz BT100X global positioning system (GPS) data loggers and Actigraph GT3X accelerometers for a 24- to 36-hour period, during which time their parents completed a location and travel diary. Data were aggregated to the minute and processed using the personal activity location measurement system (PALMS). Children successfully wore the GPS data loggers and accelerometers simultaneously, 12 of which yielded data that met quality standards. The average percent correspondence between GPS- and diary-based estimates of types of location was high and Kappa statistics were moderate to excellent, ranging from 0.49-0.99. The between-method (GPS monitor, parent-reported diary) correlations of estimated participant-aggregated minutes spent on vehicle-based trips were strong. The simultaneous use of GPS and accelerometers to assess Hispanic preschool children's location and physical activity is feasible. This methodology has the potential to provide more precise findings to inform environmental interventions and policy changes to promote physical activity among Hispanic preschool children.
身体和社会环境因素都会影响幼儿的身体活动，但对于西班牙裔儿童更可能在哪里进行活动，我们却知之甚少。我们评估了同时测量并处理西班牙裔学龄前儿童的位置和身体活动客观测量数据的可行性。学龄前西班牙裔儿童（n = 15）在24至36小时内同时佩戴QStarz BT100X全球定位系统（GPS）数据记录器和Actigraph GT3X加速度计，在此期间他们的父母完成了位置和出行日记。数据按分钟汇总，并使用个人活动位置测量系统（PALMS）进行处理。儿童成功同时佩戴了GPS数据记录器和加速度计，其中12个产生了符合质量标准的数据。基于GPS和日记的位置类型估计之间的平均对应百分比很高，卡帕统计值为中等至优秀，范围从0.49至0.99。基于方法（GPS监测器、家长报告的日记）的估计参与者在基于车辆出行上花费的总分钟数之间的相关性很强。同时使用GPS和加速度计来评估西班牙裔学龄前儿童的位置和身体活动是可行的。这种方法有潜力提供更精确的结果，为促进西班牙裔学龄前儿童身体活动的环境干预措施和政策变化提供依据。
