Table 2.
Implant Costs.
| Implant Direct Cost | Implant Total Cost | |||||
|---|---|---|---|---|---|---|
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| $, Average (SD) | % Differencea | P | $, Average (SD) | % Differencea | P | |
| Primary THA (control; n = 93) | 11307 (3026) | – | – | 14578 (3958) | – | – |
| All conversion THAs (excluding patients with history of PJI; n = 45) | 13677 (7017) | 21.0% | .472 | 18061 (9642) | 23.9% | .375 |
| All conversion THAs (including patients with history of PJI; n = 51)b | 14275 (7122) | 26.2% | .212 | 18972 (9906) | 30.1% | .150 |
| Conversion THA for failed femoral neck fracture fixation (n = 12) | 13642 (6432) | 20.7% | .047 | 17583 (8503) | 20.6% | .051 |
| Conversion THA for failed acetabular fracture fixation (n = 11) | 14526 (8536) | 28.5% | .495 | 19283 (12185) | 32.3% | .435 |
| Conversion THA for failed subtrochanteric, intertrochanteric, and proximal femur fracture fixation (n = 7)c | 12157 (4753) | 7.5% | .663 | 16554 (6957) | 13.6% | .488 |
| Conversion THA for other causes (AVN, developmental hip dysplasia, or SCFE; n = 12)d | 12878 (5870) | 13.9% | .611 | 16808 (7333) | 15.3% | .461 |
| Conversion THA for patients with history of hip joint infection (pji + history of resection; n = 9)e | 18324 (8872) | 62.1% | .054 | 25213 (12610) | 73.0% | .036 |
| Conversion THA for failed femur-related fracture fixation (n = 19)f | 13095 (5775) | 15.8% | .116 | 17204 (7783) | 18.0% | .079 |
| Conversion THA for all failed fracture fixations (n = 30)g | 13620 (6806) | 20.5% | .229 | 17966 (9478) | 23.2% | .172 |
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).