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Table 2 Within-group statistical analysis of Oxford Knee Scores

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

  Pre-operative vs. 6 months 6 months vs. 1 year 1 year vs. 2 years
p value 95%CI p value 95%CI p value 95%CI
UKRa 0.046* 0.4 to 30.8 0.336 − 5.7 to 10.3 N/A
BKRb < 0.001* 11.3 to 19.9 0.071 − 0.3 to 4.8 0.635 − 17.5 to 13.5
TKRc < 0.001* 13.6 to 21.9 0.535 − 2.2 to 4.1 0.078 − 0.3 to 3.5
  1. Paired Student’s t test
  2. 95%CI confidence interval of mean difference
  3. N/A not analysed as underpowered
  4. *Statistically significant at < 0.05 level
  5. aUKR unicompartmental knee replacement group (6 months: n = 21; 1 year: n = 15; 2 years: n = 4)
  6. bBKR bicompartmental knee replacement group (6 months: n = 39; 1 year: n = 26; 2 years: n = 15)
  7. cTKR total knee replacement group (6 months: n = 41; 1 year: n = 29; 2 years: n = 11)