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Arch Phys Med Rehabil. 2001 Aug;82(8):1115-8.

Association among neuromuscular and anatomic measures for patients with knee osteoarthritis.

Author information

1
Faculties of Health Sciences, University of Western Ontario, London, Ont, Canada. tbirming@julian.uwo.ca

Abstract

OBJECTIVE:

To investigate neuromuscular and anatomic factors involved in varus gonarthrosis by identifying measures associated with degenerative changes.

DESIGN:

Descriptive study. Individual measures that explained substantial portions of the variability in ratings of knee joint-degenerative changes in patients with knee medial compartment osteoarthritis.

SETTING:

Outpatient orthopedic clinic and biomechanics and muscular assessment laboratory.

PATIENTS:

Volunteer sample of 20 subjects (age range, 59 +/- 9 yr) with no history of neurologic disease.

INTERVENTION:

Not applicable.

MAIN OUTCOME MEASURES:

We assessed degenerative changes, varus alignment, standing balance, and knee proprioception. Weight-bearing radiographs were used to assess the extent of degenerative changes and the degree of varus alignment. Single-limb standing balance control was assessed through tests performed on a force platform. Knee proprioception was assessed with an isokinetic dynamometer, using a joint angle replication test.

RESULTS:

Forward-stepwise multiple linear regression indicated that the extent of degenerative changes could be best predicted from a linear combination of the independent variables, varus alignment, and standing balance (R =.80, F(2,17) = 14.81, p =.0002). Sixty-four percent of the variability in ratings of degenerative changes was explained by alignment and standing balance measures (37% by varus alignment, 27% by standing balance). Alignment and balance measures were poorly correlated (r =.12, p =.63), further suggesting that they provided different information about gonarthrosis.

CONCLUSIONS:

Although varus alignment is widely accepted as a clinically important factor in gonarthrosis, and is the focus of many treatment efforts, our results suggest that objective measures of standing balance are also important. As a result, the potential impact of rehabilitation to improve the control of standing balance should be further evaluated in this patient population.

PMID:
11494192
DOI:
10.1053/apmr.2001.24306
[Indexed for MEDLINE]
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