Table 3.
Hospital Operating Costs.
| Hospital Operating Direct Cost | Hospital Operating Total Cost | |||||
|---|---|---|---|---|---|---|
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|
|
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| $, Average (SD) | % Differencea | P | $, Average (SD) | % Differencea | P | |
| Primary THA (control; n = 93) | 9589 (2685) | – | – | 15409 (4448) | – | – |
| All conversion THAs (excluding patients with history of PJI; n = 45) | 12385 (6512) | 29.2% | .005 | 19841 (10560) | 28.8% | .007 |
| All conversion THAs (including patients with history of PJI; n = 51)b | 12624 (6295) | 31.7% | .001 | 20236 (10206) | 31.3% | .001 |
| Conversion THA for failed femoral neck fracture fixation (n = 12) | 11866 (5261) | 23.7% | .099 | 18920 (8450) | 22.8% | .134 |
| Conversion THA for failed acetabular fracture fixation (n = 11) | 15433 (11219) | 60.9% | .002 | 24742 (18239) | 60.6% | .003 |
| Conversion THA for failed subtrochanteric, intertrochanteric, and proximal femur fracture fixation (n = 7)c | 11722 (4494) | 22.2% | .337 | 18953 (7502) | 23.0% | .342 |
| Conversion THA for other causes (AVN, developmental hip dysplasia, or SCFE; n = 12)d | 10403 (1319) | 8.5% | .228 | 16700 (2138) | 8.4% | .219 |
| Conversion THA for patients with history of hip joint infection (PJI + history of resection; n = 9)e | 13864 (3630) | 44.6% | .002 | 22198 (5789) | 44.1% | .002 |
| Conversion THA for failed femur-related fracture fixation (n = 19)f | 11813 (4863) | 23.2% | .128 | 18932 (7899) | 22.9% | .147 |
| Conversion THA for all failed fracture fixation (n = 30)g | 13140 (7825) | 37.0% | .021 | 21062 (12710) | 36.7% | .028 |
Percent difference calculation: [(average of conversion THA subgroup − average of primary THA)/(average of primary THA)] * 100%.
Conversion THA patients with history of PJI (n = 6).
Subtrochanteric fracture (n = 2), intertrochanteric fracture (n = 2), and proximal femur fracture (n = 3).
SCFE (n = 6), developmental hip dysplasia (n = 3), and AVN (n = 3).
Conversion THA patients with history of PJI (n = 6) and history of resection (n = 3).
Femoral neck fracture (n = 12), subtrochanteric fracture (n = 2), intertrochanteric fracture (n = 2), and proximal femur fracture (n = 3).
Acetabular fracture (n = 11), femoral neck fracture (n = 12), subtrochanteric fracture (n = 2), intertrochanteric fracture (n = 2), and proximal femur fracture (n = 3).