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Table 12 Time until revision for UKA and TKA

From: Unicompartmental knee arthroplasty: A PearlDiver study evaluating complications rates, opioid use and utilization in the Medicare population

  UKA Patients UKA revisions Avg. time between UKA and revision
# % p RR 95% CI mean (SD) Δ 95% CI
Total 20,592 364 1.77% - - - 932.942 (SD 768.273) - -
Age at UKA
  < 70 8,018 185 2.31% - - - 862.746 (SD 755.779) - -
 70–79 9,433 140 1.48%  < 0.0001 0.6432 (0.5175, 0.7995) 1039.486 (SD 778.513) -176.74 (-199.296, -154.184)
  > 80 3,191 36 1.13%  < 0.0001 0.4890 (0.3430, 0.6971) 789.528 (SD 697.079) 73.218 (42.137, 104.299)
Gender
 Female 10,543 224 2.12% - - - 981.920 (SD 773.567) - -
 Male 9,933 135 1.36%  < 0.0001 0.6397 (0.5176, 0.7906) 823.778 (SD 739.283) 158.142 (137.420, 178.864)
  TKA patients TKA revisions Avg. time between TKA and revision
  # % p RR 95% CI mean (SD) Δ 95% CI
Total 110,562 3,630 3.28% - - - 866.597 (SD 754.557) - -
Age at TKA
  < 70 41,518 1,865 4.49% - - - 898.958 (SD 775.442) - -
 70–79 52,129 1,525 2.93%  < 0.0001 0.6513 (0.6094, 0.6960) 908.423 (SD 772.142) -9.4650 (-19.220, 0.290)
  > 80 19,632 368 1.87%  < 0.0001 0.4173 (0.3736, 0.4660) 718.584 (SD 669.883) 180.3740 (167.529, 193.219)
Gender
 Female 71,394 2,279 3.19% - - - 896.808 (SD 761.672) - -
 Male 38,214 1,211 3.17% 0.8352 0.9927 (0.9269, 1.0632) 814.272 (SD 743.505) 82.5360 (73.2201, 91.8519)