Agreement between Fitbit and ActiGraph Estimates of Physical Activity in Young Children.
Agreement between Fitbit and ActiGraph Estimates of Physical Activity in Young Children.
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Fitbit 和 ActiGraph 对幼儿身体活动的估计之间的一致性。
DOI：
10.1080/1091367x.2022.2125319
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发表时间：
2023
影响因子：
2.1
通讯作者：
Ahn,SunJooGrace
中科院分区：
文献类型：
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作者：
Schmidt,MichaelD;Rathbun,StephenL;Chu,Zhixuan;Boudreaux,BenjaminD;Hahn,Lindsay;Novotny,Eric;Johnsen,Kyle;Ahn,SunJooGrace
在123名小学儿童中，将Fitbit Flex 2的身体活动（PA）估计值与ActiGraph GT9X Link的估计值进行了比较。使用两个不同的ActiGraph临界点（Evenson和Romanzini）计算PA和3个月PA变化的步长和强度特异性估计值。与ActiGraph相比，Fitbit的步数估计值高出35%。Fitbit和ActiGraph强度特异性估计值最接近久坐和轻度PA，而中度和剧烈PA的估计值变化很大，具体取决于所使用的ActiGraph临界点。器械估计值之间的斯皮尔曼相关性在步数（rs= 0.70）方面高于中度（rs= 0.54至0.55）或剧烈（rs= 0.29至0.48）PA。在评估PA随时间的变化方面，器械之间的一致性较低。Fitbit Flex 2和ActiGraph估计值之间的一致性可能取决于用于对PA强度进行分类的临界点。然而，在对儿童的步数和MVPA进行排名时，设备之间存在良好的一致性。
Physical activity (PA) estimates from the Fitbit Flex 2 were compared to those from the ActiGraph GT9X Link in 123 elementary school children. Steps and intensity-specific estimates of PA and 3-month PA change were calculated using two different ActiGraph cut-points (Evenson and Romanzini). Fitbit estimates were 35% higher for steps compared to the ActiGraph. Fitbit and ActiGraph intensity-specific estimates were closest for sedentary and light PA, while estimates of moderate and vigorous PA varied substantially depending upon the ActiGraph cut-points used. Spearman correlations between device estimates were higher for steps (rs= .70) than for moderate (rs=.54 to .55) or vigorous (rs=.29 to .48) PA. There was low concordance between devices in assessing PA changes over time. Agreement between Fitbit Flex 2 and ActiGraph estimates may depend upon the cut-points used to classify PA intensity. However, there is fair to good agreement between devices in ranking children’s steps and MVPA.