Cross-Validation of Two Accelerometers for Assessment of Physical Activity and Sedentary Time in Preschool Children
Cross-Validation of Two Accelerometers for Assessment of Physical Activity and Sedentary Time in Preschool Children
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DOI：
10.1123/pes.2016-0074
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发表时间：
2017-05-01
影响因子：
1.8
通讯作者：
Spencer, Rebecca M. C.
中科院分区：
文献类型：
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作者：
Alhassan, Sofiya;Sirard, John R.;Spencer, Rebecca M. C.
目的：本研究的目的是交叉验证先前开发的Actiwatch（AW; Ekblom et al. 2012）和AcitGraph（AG; Sirard et al. 2005; AG-P，Pate et al. 2006）临界点方程，以直接观察（DO）作为标准测量对学龄前儿童的自由生活体力活动（PA）进行分类。第二个目的是比较输出的AW和AG从以前开发的方程。研究方法：参与者（n = 33;年龄= 4.4 +/- 0.8岁;女性，n=12）的PA在学龄前直接观察了三个10分钟的时间，同时佩戴AW（非优势手腕）和AG（腰部）。使用器械特定临界点将AW-E（Ekblom等人，2012）和AG（AG-S，Sirard等人，2005; AG-P，Pate等人，2006）数据归为强度类别。使用斯皮尔曼相关性（r（sp））和一致性统计量评估DO强度类别与器械数据之间的相关性。使用混合模型回归来确定活动强度类别中花费的时间的差异。结果：所有数据中，AW和AG输出之间存在显著相关性（r（sp）= 0.41，p
Purpose: The purpose of this study was to cross-validate previously developed Actiwatch (AW; Ekblom et al. 2012) and AcitGraph (AG; Sirard et al. 2005; AG-P, Pate et al. 2006) cut-point equations to categorize free-living physical activity (PA) of preschoolers using direct observation (DO) as the criterion measure. A secondary aim was to compare output from the AW and the AG from previously developed equations. Methods: Participants' (n = 33; age = 4.4 +/- 0.8 yrs; females, n=12) PA was directly observed for three 10-min periods during the preschool-day while wearing the AW (nondominant wrist) and AG (waist). Device specific cut points were used to reduce the AW-E (Ekblom et al. 2012) and AG (AG-S, Sirard et al. 2005; AG-P, Pate et al. 2006) data into intensity categories. Spearman correlations (r(sp)) and agreement statistics were used to assess associations between the DO intensity categories and device data. Mixed model regression was used to identify differences in times spent in activity intensity categories. Results: There was a significant correlation between AW and AG output across all data (r(sp) = 0.41, p