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Table 1 Change in average scale scores from baseline to 6-month follow-up.

From: Functional improvement after Total Knee Arthroplasty Revision: New observations on the dimensional nature of outcome

Scale N Baseline Follow-up Change Normalized Change#
SF-36, PCS 172 31.2 ± 7.3 37.2 ± 9.4 6.2 ± 9.1* 0.68*
SF-36, MCS 172 48.4 ± 12.3 50.5 ± 11.4 1.5 ± 11.5 0.13
WOMAC, Pain 177 9.9 ± 4.5 5.6 ± 4.5 4.2 ± 4.8* 0.88*
WOMAC, Stiffness 181 4.1 ± 1.9 3.1 ± 2.0 1.0 ± 2.1* 0.48*
WOMAC, Diff. of Function 177 33.9 ± 14.2 21.9 ± 15.1 11.8 ± 14.4* 0.82*
KSS, Knee Rating 105 40.8 ± 18.0 76.4 ± 15.2 37.8 ± 23.0* 1.64*
KSS, Functional Assessment 160 40.4 ± 21.4 62.7 ± 25.4 23.1 ± 27.9* 0.83*
LEAS 172 7.6 ± 2.5 8.5 ± 2.6 0.9 ± 2.8* 0.33*
Physician Severity Assessment 142 6.8 ± 2.1 2.8 ± 2.1 4.1 ± 2.9* 1.42*
  1. ‡ Positive values denote improvement
  2. # Normalized by standard deviation of change
  3. * Change is significant at the 0.001 level (2-tailed)