Test-retest strength reliability: hand-held dynamometry in community-dwelling elderly fallers.

Abstract:

OBJECTIVE:To determine the reliability of a standardized protocol by using a hand-held dynamometer (HHD) to measure lower-extremity strength in community-dwelling elderly fallers. DESIGN:Within-session test-retest reliability of the HHD. SETTING:Balance laboratory of a university. PARTICIPANTS:A convenience sample of 41 community-dwelling elders (61-90y) who fell at least once in the previous year. INTERVENTION:The strengths of 8 lower-extremity muscle groups bilaterally were tested twice, with an intervening rest period of 15 seconds. MAIN OUTCOME MEASURE:Maximal isometric force. RESULTS:Test-retest intraclass correlation coefficients (ICCs) were high, generally ranging from.95 to.99 for 1 trial (ICC(2,1)) and from.97 to 1.00 for the mean of 2 trials (ICC(2,2)). There were no significant differences in strength values across trials (P>.05). Men had significantly greater strength than women across all muscle groups (P>.05). Right knee extensor strength demonstrated the largest trial-to-trial difference,.54 kg using a single measurement and.39 kg using the mean of both measurements. Among the 3 lower-extremity muscle groups, the ankle showed higher a coefficient of variation (CV=5.1%-7.4%) than the knee (CV=4.6%-5.1%) or the hip (CV=4.2%-6.3%) when using 1 measure. CONCLUSION:By using an HHD and a standardized measurement protocol, a novice tester can obtain reliable lower-extremity strength values in community-dwelling elderly fallers.

journal_name

Arch Phys Med Rehabil

authors

Wang CY,Olson SL,Protas EJ

doi

10.1053/apmr.2002.32743

subject

Has Abstract

pub_date

2002-06-01 00:00:00

pages

811-5

issue

6

eissn

0003-9993

issn

1532-821X

pii

S0003-9993(02)32509-7

journal_volume

83

pub_type

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