| U-TKA (n = 8633) | TA-TKA (n = 8633) | p-Value |
---|---|---|---|
Operative time (min)—mean (SD) | 92.6 (39.8) | 92.4 (33.4) | 0.670 |
Length of stay (days)—mean (SD) | 2.76 (1.86) | 2.68 (2.51) | 0.017 |
Discharge destination—no. (%) |  |  |  < 0.001 |
 Home | 6077 (70.4) | 6376 (73.9) |  < 0.001 |
 Unskilled facility | 7 (0.1) | 4 (0.1) | 0.366 |
 Rehab/skilled nursing facility | 2238 (25.9) | 1964 (22.7) |  < 0.001 |
 Expired/hospice | 9 (0.1) | 2 (0.0) | 0.035 |
 Other/AMA | 16 (0.2) | 6 (0.1) | 0.033 |
 Unknown | 286 (3.3) | 281 (3.3) | 0.831 |
Major complication—no. (%) | 810 (9.4) | 659 (7.6) |  < 0.001 |
 Any wound complication | 24 (0.3) | 25 (0.3) | 1.000 |
 Periprosthetic infection | 5 (0.1) | 6 (0.1) | 0.774 |
 Transfusion | 439 (5.1) | 336 (3.9) |  < 0.001 |
 Systemic infection | 24 (0.3) | 23 (0.3) | 1.000 |
 DVT/PE | 105 (1.2) | 98 (1.1) | 0.672 |
 Cardiac | 19 (0.2) | 15 (0.2) | 0.607 |
 Respiratory | 76 (0.9) | 59 (0.7) | 0.167 |
 Neurologic | 8 (0.1) | 5 (0.1) | 0.581 |
 Renal | 6 (0.1) | 1 (0.0) | 0.125 |
Reoperations—no. (%) | 75 (0.9) | 87 (1.0) | 0.344 |
 Unrelated operation | 31 (0.4) | 31 (0.4) | 1.000 |
 Periprosthetic fracture | 8 (0.1) | 5 (0.1) | 0.405 |
 Superficial irrigation and debridement | 7 (0.1) | 12 (0.1) | 0.251 |
 Periprosthetic infection | 10 (0.1) | 14 (0.2) | 0.414 |
 Hardware complication or dislocation | 10 (0.1) | 8 (0.1) | 0.637 |
 Other operation related to TKA | 9 (0.1) | 17 (0.2) | 0.116 |
Readmission—no. (%) | 275 (3.2) | 236 (2.7) | 0.080 |
 Unspecified | 58 (0.7) | 63 (0.7) | 0.648 |
 Gastrointestinal | 23 (0.3) | 24 (0.3) | 0.884 |
 Cardiac | 23 (0.3) | 15 (0.2) | 0.194 |
 Pulmonary | 15 (0.2) | 14 (0.2) | 0.853 |
 Hematological | 35 (0.4) | 36 (0.4) | 0.905 |
 Other medical diagnosis | 37 (0.4) | 22 (0.3) | 0.050 |
 Unrelated musculoskeletal diagnosis | 16 (0.2) | 9 (0.1) | 0.161 |
 Periprosthetic fracture | 4 (0.0) | 4 (0.0) | 1.000 |
 Superficial surgical site infection | 46 (0.5) | 27 (0.3) | 0.026 |
 Periprosthetic infection | 14 (0.2) | 18 (0.2) | 0.479 |
 Unspecified TKA complication or dislocation | 4 (0.0) | 4 (0.0) | 1.000 |
Mortality—no. (%) | 4 (0.0) | 9 (0.1) | 0.267 |