Test-retest reliability of trunk accelerometry during standing and walking

被引:188
作者
Moe-Nilssen, R [1 ]
机构
[1] Univ Bergen, Fac Med, Div Physiotherapy Sci, N-5009 Bergen, Norway
来源
ARCHIVES OF PHYSICAL MEDICINE AND REHABILITATION | 1998年 / 79卷 / 11期
关键词
D O I
10.1016/S0003-9993(98)90231-3
中图分类号
R49 [康复医学];
学科分类号
100215 ;
摘要
Objective: To investigate repeatability of acceleration measured by a portable, triaxial accelerometer over the lumbar spine as a measure of balance during standing and walking. Design: Acceleration was measured along three axes and transformed to a horizontal-vertical coordinate system. Standing was tested on two feet, vision unobstructed and obstructed, and on one foot, vision unobstructed. Walking was tested in five different self-selected speeds on even and uneven ground. Retest was performed after 2 days. Setting: A flat floor with a 7m uneven mat. Subjects: Nineteen healthy students. Main Outcome Measures: Standing: Acceleration root mean square (RMS). Walking: Point estimate of acceleration RMS for a reference walking speed (1.2m/sec). All tests: Within-subject standard deviation (s(w)), intraclass correlation coefficients (ICCs), Results: The s(w) indicated high absolute test-retest repeatability for standing on two feet. Because of restricted ranges of value, relative reliability was low, however, with ICC(3,1) <.56, For standing on one foot, absolute and relative reliability were highest in the mediolateral direction, with ICC(3,1) =.84. For the walking tests, ICC(3,1) ranged from .79 to .94 for the three axes. Reliability was on the same level for even and uneven ground. Conclusion: The results indicate that accelerometry without need for stationary instrumentation is a reliable method that may be useful for studying standing balance and gait in the clinic. (C) 1998 by the American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation.
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页码:1377 / 1385
页数:9
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