Performance of the ActiGraph accelerometer using a national population-based sample of youth and adults.
Performance of the ActiGraph accelerometer using a national population-based sample of youth and adults.
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DOI：
10.1186/s13104-014-0970-2
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发表时间：
2015-01-17
影响因子：
1.8
通讯作者：
Wen, Fang
中科院分区：
文献类型：
--
作者：
Evenson, Kelly R;Wen, Fang
背景技术背景：加速度计输出在本质上可以是半连续的或连续的，这对辨别非磨损和定义身体活动强度水平具有影响。这项研究描述了基于场的加速度计性能从青年和adultes.METHODS的监测样本：使用2003-2006年国家健康和营养检查调查数据，4,028名6至17岁的青年和7,931名年龄>=18岁的成年人佩戴ActiGraph AM 7164加速度计一周，提供至少3天的磨损>=8小时/天。通过探索每个参与者的加速度计计数/分钟的不同值的数量来评估加速度计性能。平均而言，青年参与者在7天内有1381个不同的计数/分钟（中位数1360，四分位数范围1127-1623），成年参与者在7天内有1101个不同的计数/分钟（中位数1085，四分位数范围874-1313）。对于青年和成年人，当限制到计数/分钟0至4999之间，每一个可能的值（计数/分钟）发生至少一次。结论：基于字段的数据证实，在这项研究中使用的加速度计允许连续计数/分钟，通过所有，但最激烈的活动通常会发生。
BACKGROUND: Accelerometer output may be semi-continuous or continuous in nature, which has implications on discerning non-wear and defining physical activity intensity levels. This study described field-based accelerometer performance from a surveillance sample of youth and adults.METHODS: Using 2003-2006 National Health and Nutrition Examination Survey data, 4,028 youth ages 6 to 17 years and 7,931 adults age>=18 years wore an ActiGraph AM7164 accelerometer for one week, providing at least 3 days of wear for>=8 hours/day. Accelerometer performance was assessed by exploring the number of different values of accelerometer counts/minute for each participant.RESULTS: On average, youth participants had 1381 different counts/minute over 7 days (median 1360, interquartile range 1127-1623) and adult participants had 1101 different counts/minute over 7 days (median 1085, interquartile range 874-1313). For both youth and adults, when restricting to counts/minute between 0 to 4999, every possible value (in counts/minute) occurred at least once.CONCLUSION: The field-based data confirmed that the accelerometer used in this study allowed for continuous counts/minute through which all but the most vigorous activities would usually occur.