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Meta-Analysis
. 2014 Jul;93(7):579-85.
doi: 10.1097/PHM.0000000000000065.

Predicting functional performance and range of motion outcomes after total knee arthroplasty

Michael J Bade  1 , John M Kittelson, Wendy M Kohrt, Jennifer E Stevens-Lapsley
Affiliations
Meta-Analysis

Predicting functional performance and range of motion outcomes after total knee arthroplasty

Michael J Bade et al. Am J Phys Med Rehabil. 2014 Jul.

Abstract

Objective: The aim of this study was to assess the predictive value of functional performance and range of motion measures on outcomes after total knee arthroplasty.

Design: This is a secondary analysis of two pooled prospective randomized controlled trials. Sixty-four subjects (32 men and 32 women) with end-stage knee osteoarthritis scheduled to undergo primary total knee arthroplasty were enrolled. Active knee flexion and extension range of motion, Timed Up and Go (TUG) test time, and 6-min walk test distance were assessed.

Results: Preoperative measures of knee flexion and extension were predictive of long-term flexion (β = 0.44, P < 0.001) and extension (β = 0.46, P < 0.001). Acute measures of knee flexion and extension were not predictive of long-term flexion (β = 0.09, P = 0.26) or extension (β = 0.04, P = 0.76). Preoperative TUG performance was predictive of long-term 6-min walk performance (β = -21, P < 0.001). Acute TUG performance was predictive of long-term functional performance on the 6-min walk test, after adjusting for the effects of sex and age (P = 0.02); however, once adjusted for preoperative TUG performance, acute TUG was no longer related to long-term 6-min walk performance (P = 0.65).

Conclusions: Acute postoperative measures of knee range of motion are of limited prognostic value, although preoperative measures have some prognostic value. However, acute measures of functional performance are of useful prognostic value, especially when preoperative functional performance data are unavailable.

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Conflict of interest statement

Financial disclosure statements have been obtained, and no conflicts of interest have been reported by the authors or by any individuals in control of the content of this article.

Figures

FIGURE 1
FIGURE 1
Relation between preoperative (A) and acute (B) knee flexion with long-term knee flexion.
FIGURE 2
FIGURE 2
Relation between preoperative (A) and acute (B) knee extension with long-term knee extension. Negative values of knee extension represent hyperextension.
FIGURE 3
FIGURE 3
Relation between preoperative (A) and acute (B) TUG time with long-term 6MW distance. TUG time has been log transformed.
See this image and copyright information in PMC

Comment in

References

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