Table III

Demographics and Crude Complication Rates After Total Knee Replacement With and Without Previous Knee Fusion

Demographic factorFusionNo fusion
Mean age, yr60.969.6*
Follow-up, yr2.82.4
Male sex, %61.138.0
Diagnosis not osteoarthritis, %33.38.8*
Comorbid conditions > 1, %11.13.2§
Mean hospital volume, no./yr106.8143.9
Mean surgeon volume, no./yr38.549.5
Mean length of hospital stay, d13.110.3
Complication present at index admission, %22.210.3
Revision within 4 yr, %5.62.0
Fusion or re-fusion within 4 yr, %11.10.1
Excision within 4 yr, %16.70.8
Patellar replacement or patelloplasty. %27.885.3
Infection within 4 yr, %11.12.2
Urinary tract infection at index admission, %5.62.0
Deep venous thrombosis within 3 mo of index admission, %5.62.6
  • Student’s t-test was used for continuous variables, the χ2 test for categorical variables (with continuity correction). Fisher’s exact test was used when 1 or more cells had fewer than 5 expected counts. Comparisons between patients who underwent hip fusion takedown and those who did not may be biased since no adjustment was made for other potentially confounding factors.

  • * p < 0.01,

  • p < 0.05,

  • p < 0.0001,

  • § p < 0.001