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Varus-valgus motion and functional ability in patients with knee osteoarthritis.
Ann Rheum Dis 2008; 67(4):471-7AR

Abstract

OBJECTIVE

To assess the relationship between knee varus-valgus motion and functional ability, and the impact of knee varus-valgus motion on the relationship between muscle strength and functional ability in patients with osteoarthritis (OA) of the knee.

METHODS

Sixty-three patients with knee OA were tested. Varus-valgus motion was assessed by optoelectronic recording and three-dimensional motion analysis. Functional ability was assessed by observation, using a 100 m walking test, a Get Up and Go test, and WOMAC questionnaire. Muscle strength was measured by a computer-driven isokinetic dynamometer. Regression analyses were performed to assess the relationships between varus-valgus motion and functional ability, and to assess the impact of varus-valgus motion on the relationship between muscle strength and functional ability.

RESULTS

In patients with high varus-valgus range of motion, muscle weakness was associated with a stronger reduction in functional ability (ie, longer walking time and Get Up and Go time) than in patients with low varus-valgus range of motion. A pronounced varus position and a difference between the left and right knees in varus-valgus position were related with reduced functional ability.

CONCLUSIONS

In patients with knee OA with high varus-valgus range of motion, muscle weakness has a stronger impact on functional ability than in patients with low varus-valgus range of motion. Patients with knee OA with more pronounced varus knees during walking show a stronger reduction in functional ability than patients with less pronounced varus knees or with valgus knees.

Authors+Show Affiliations

Jan van Breemen Institute, Center for Rheumatology and Rehabilitation. Jan van Breemenstraat 2, 1056 AB Amsterdam, The Netherlands. M.vd.Esch@janvanbreemen.nlNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17604283

Citation

van der Esch, M, et al. "Varus-valgus Motion and Functional Ability in Patients With Knee Osteoarthritis." Annals of the Rheumatic Diseases, vol. 67, no. 4, 2008, pp. 471-7.
van der Esch M, Steultjens M, Harlaar J, et al. Varus-valgus motion and functional ability in patients with knee osteoarthritis. Ann Rheum Dis. 2008;67(4):471-7.
van der Esch, M., Steultjens, M., Harlaar, J., Wolterbeek, N., Knol, D., & Dekker, J. (2008). Varus-valgus motion and functional ability in patients with knee osteoarthritis. Annals of the Rheumatic Diseases, 67(4), pp. 471-7.
van der Esch M, et al. Varus-valgus Motion and Functional Ability in Patients With Knee Osteoarthritis. Ann Rheum Dis. 2008;67(4):471-7. PubMed PMID: 17604283.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Varus-valgus motion and functional ability in patients with knee osteoarthritis. AU - van der Esch,M, AU - Steultjens,M, AU - Harlaar,J, AU - Wolterbeek,N, AU - Knol,D, AU - Dekker,J, Y1 - 2007/06/29/ PY - 2007/7/3/pubmed PY - 2008/4/17/medline PY - 2007/7/3/entrez SP - 471 EP - 7 JF - Annals of the rheumatic diseases JO - Ann. Rheum. Dis. VL - 67 IS - 4 N2 - OBJECTIVE: To assess the relationship between knee varus-valgus motion and functional ability, and the impact of knee varus-valgus motion on the relationship between muscle strength and functional ability in patients with osteoarthritis (OA) of the knee. METHODS: Sixty-three patients with knee OA were tested. Varus-valgus motion was assessed by optoelectronic recording and three-dimensional motion analysis. Functional ability was assessed by observation, using a 100 m walking test, a Get Up and Go test, and WOMAC questionnaire. Muscle strength was measured by a computer-driven isokinetic dynamometer. Regression analyses were performed to assess the relationships between varus-valgus motion and functional ability, and to assess the impact of varus-valgus motion on the relationship between muscle strength and functional ability. RESULTS: In patients with high varus-valgus range of motion, muscle weakness was associated with a stronger reduction in functional ability (ie, longer walking time and Get Up and Go time) than in patients with low varus-valgus range of motion. A pronounced varus position and a difference between the left and right knees in varus-valgus position were related with reduced functional ability. CONCLUSIONS: In patients with knee OA with high varus-valgus range of motion, muscle weakness has a stronger impact on functional ability than in patients with low varus-valgus range of motion. Patients with knee OA with more pronounced varus knees during walking show a stronger reduction in functional ability than patients with less pronounced varus knees or with valgus knees. SN - 1468-2060 UR - https://www.unboundmedicine.com/medline/citation/17604283/abstract/Varus_Valgus_motion_and_functional_ability_in_patients_with_osteoarthritis_of_the_knee_ L2 - http://ard.bmj.com/cgi/pmidlookup?view=long&pmid=17604283 DB - PRIME DP - Unbound Medicine ER -