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Table 5 Between-group statistical analysis of Western Ontario and MacMaster Universities Osteoarthritis Index (WOMAC) sub-scores

From: Unicompartmental vs. segmental bicompartmental vs. total knee replacement: comparison of clinical outcomes

  UKRa vs. BKRb UKRa vs. TKRc BKRb vs. TKRc
p value 95%CI p value 95%CI p value 95%CI
Pre-operative
 Function 0.914 − 11.8 to 16.6 0.031* 1.0 to 25.7 0.073 −0.8 to 22.7
 Pain 0.863 − 13.0 to 18.5 0.435 − 6.3 to 19.8 0.793 −9.3 to 16.2
 Stiffness 0.851 − 14.6 to 23.1 0.575 −9.4 to 22.9 0.921 −13.2 to 18.3
6 months
 Function 0.808 − 18.3 to 31.1 0.706 − 15.9 to 31.6 0.966 − 15.6 to 12.6
 Pain 0.275 − 7.7 to 35.7 0.227 − 6.4 to 35.2 0.997 − 13.0 to 13.7
 Stiffness 0.275 − 7.9 to 36.5 0.279 − 7.6 to 34.8 0.991 − 14.3 to 12.9
1 year
 Function 0.589 − 11.2 to 26.5 0.349 − 7.6 to 28.4 0.920 −14.2 to 19.7
 Pain 0.498 − 9.0 to 24.8 0.328 − 6.5 to 25.7 0.961 − 13.5 to 16.9
 Stiffness 0.686 − 13.8 to 28.3 0.508 − 10.8 to 29.4 0.963 − 16.9 to 21.0
2 years
 Function 0.197 − 6.7 to 40.6 0.850 − 19.4 to 30.4 0.424 − 10.8 to 33.8
 Pain 0.522 − 12.8 to 33.6 0.990 − 23.0 to 25.8 0.396 − 10.2 to 33.6
 Stiffness 0.304 − 11.0 to 45.6 0.929 − 25.3 to 34.2 0.472 − 13.9 to 39.5
  1. One-way analysis of variance (ANOVA) and Tukey’s post-hoc pairwise comparison
  2. 95%CI confidence interval of mean difference
  3. *Statistically significant at <0.05 level.
  4. aUKR unicompartmental knee replacement group (6 months: n = 25; 1 year: n = 18; 2 years: n = 9)
  5. bBKR bicompartmental knee replacement group (6 months: n = 41; 1 year: n = 29; 2 years: n = 16)
  6. cTKR total knee replacement group (6 months: n = 45; 1 year: n = 26; 2 years: n = 14)