Knee arthroplasty helped increase patients walking
speed at 6 months to 60 months postoperatively, according to a study conducted
by researchers in The Netherlands.
Test-retest reliability of walking speed
measurements is high, and when the same investigators monitor the same
subjects, it should be possible to assess the walking speed effects of knee
arthroplasty, the authors wrote in the study abstract. The present
study reports a meta-analysis of these effects.
For the analysis, the authors looked through 16
independent comparisons of preoperative and postoperative walking speed for
patients who underwent knee arthroplasty. They identified 12 studies in their
survey of Medline, Web of Science, and PEDro, for a total of 419 patients.
The authors wrote, For 0.5 months to 5 months
postoperatively, heterogeneity was too large to obtain a valid estimate of the
overall effect-size. For 6 months to 12 months and 13 months to 60 months
postoperatively, heterogeneity was absent, low or moderate (depending on
estimated pre-post correlations).
During the 6-month to 12-month and the 13-month to
60-month periods, patients in the study experienced an average speed increase
of 0.8 standard deviations. Further analysis, however, suggested initial
improvements in speed would be followed by a decline, the authors noted.