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Arch Phys Med Rehabil. 2008 Jun;89(6):1146-54. doi: 10.1016/j.apmr.2007.10.028.

Intrarater test-retest reliability of hip range of motion and hip muscle strength measurements in persons with hip osteoarthritis.

Author information

  • 1Center for Health, Exercise and Sports Medicine, School of Physiotherapy, University of Melbourne, Melbourne, Australia. y.pua@pgrad.unimelb.edu.au

Erratum in

  • Arch Phys Med Rehabil. 2008 Aug;89(8):1628. Wrigley Tim W [corrected to Wrigley, Tim V].

Abstract

OBJECTIVE:

To examine the relative and absolute intrarater test-retest reliability of muscle strength and range of motion (ROM) measurements of the hip performed in people with hip osteoarthritis.

DESIGN:

Repeated measures.

SETTING:

Human movement laboratory of a university.

PARTICIPANTS:

Participants (N=22; 10 men, 12 women; age range, 50-84y) with hip osteoarthritis.

INTERVENTIONS:

On 2 separate occasions, at least 1 week apart, isometric torque measurements were obtained from the hip rotators, flexors, abductors, and extensors. Passive ROMs in hip rotation, flexion, abduction, and extension were also determined.

MAIN OUTCOME MEASURES:

Relative reliability was estimated using the intraclass correlation coefficient, model 2,2 (ICC(2,2)). Absolute reliability was estimated using the coefficient of variation (CV) and the standard error (SE) of measurement.

RESULTS:

For measurements of muscle strength, ICC(2,2) ranged from .84 to .97, and the CV ranged from 8% to 15.7%. Hip extensors and internal and external rotators showed high ICC(2,2) (>.96) and low CV (<9.8%); hip abductors showed the lowest ICC(2,2) (.84) and the highest CV (15.7%). For ROM measurements, ICC(2,2) ranged from .86 to .97 and SE ranged from 3.1 degrees to 4.7 degrees . Hip flexion ROM showed the highest ICC(2,2) (.97) and an SE of 3.5 degrees ; hip extension ROM showed the lowest ICC(2,2) (.86) and the highest SE (4.7 degrees ).

CONCLUSIONS:

Strength and ROM testing of the hip in people with hip osteoarthritis can be performed with good to excellent reliability.

PMID:
18503813
[PubMed - indexed for MEDLINE]
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