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Table 10 Time betwen UKA and TKA for patients undergoing conversion

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

  Number of UKA patients UKA patients converted to TKA Average time between UKA and TKA
# % p RR 95% CI Days Δ 95% CI
Total 20,592 447 2.17% - - - 987.378 (SD 764.815) - -
Age at UKA
  < 70 8,018 223 2.78% - - - 988.852 (SD 781.501) - -
 70–79 9,433 168 1.78%  < 0.0001 0.6404 (0.5253, 0.7806) 980.262 (SD 729.328) 8.590 (-13.921, 31.101)
  > 80 3,191 43 1.35%  < 0.0001 0.4845 (0.3505, 0.6698) 806.558 (SD 768.786) 182.294 (151.274, 213.314)
Gender
 Female 10,543 264 2.50% - - - 971.417 (SD 746.139) - -
 Male 9,933 169 1.70%  < 0.0001 0.6795 (0.5613, 0.8226) 965.391 (SD 785.201) 6.026 (-14.9808, 27.0328)