Effect of ActiGraph GT3X+Position and Algorithm Choice on Step Count Accuracy in Older Adults

被引：45
作者：
Korpan, Sheila M. [1 ]
Schafer, Jenessa L. [1 ]
Wilson, Kaylie C. S. [1 ]
Webber, Sandra C. [2 ]
机构：
[1] Univ Saskatchewan, Sch Phys Therapy, Saskatoon, SK, Canada
[2] Univ Manitoba, Fac Hlth Sci, Coll Rehabil Sci, Dept Phys Therapy, Winnipeg, MB, Canada
来源：
JOURNAL OF AGING AND PHYSICAL ACTIVITY | 2015年 / 23卷 / 03期
关键词：
accelerometer; accuracy; activity monitors; physical activity; walking; PHYSICAL-ACTIVITY; ACTIVITY MONITORS; WEIGHT-BEARING; ACCELEROMETER; WALKING; PEDOMETER; GAIT; QUESTIONNAIRE; GENERATIONS; MOBILITY;
D O I：
10.1123/japa.2014-0033
中图分类号：
R592 [老年病学]; C [社会科学总论];
学科分类号：
03 ; 0303 ; 100203 ;
摘要：
Accelerometer step count accuracy may be affected by gait speed, device positioning, and analysis algorithm selection. We assessed ActiGraph GT3X+ step count accuracy related to device placement and analysis algorithm in older adults with walking aids (n = 13) and without walking aids (n = 22). Participants (81.5 +/- 5.0 years of age) completed a timed 100-m walk wearing five GT3X+ monitors (hips, ankles, lumbar spine). Individuals with walking aids had slower gait speeds (0.8 +/- 0.20 m/s versus 1.2 +/- 0.20 m/s without walking aids, p <.001). Intraclass correlation coefficient values for observed versus monitored steps were highest when ankle placement and the low frequency extension (LFE) algorithm were used (left ankle ICC =.989, right ankle ICC =.998). Using the GT3X+ ankle placement and analyzing data with the LFE algorithm resulted in the most accurate step counts in older adults.
引用
收藏
页码：377 / 382
页数：6
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