Table 4.
Direct Hospital Cost, Total Hospital Cost, and Cost-Price Cost.
| Direct Hospital Cost | Total Hospital Cost | Cost-Price Cost | |||||||
|---|---|---|---|---|---|---|---|---|---|
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| $, Average (SD) | % Differencea | P | $, Average (SD) | % Differencea | P | $, Average (SD) | % Differencea | P | |
| Primary THA (control; n = 93) | 20896 (4158) | – | – | 29987 (6212) | – | – | 18099 (2130) | – | – |
| All conversion THAs (excluding patients with history of PJI; n = 45) | 26062 (10926) | 24.7% | .009 | 37902 (16567) | 26.4% | .005 | 18473 (1969) | 2.1% | .397 |
| All conversion THAs (including patients with history of PJI; n = 51)b | 26899 (10655) | 28.7% | .001 | 39209 (16216) | 30.8% | <.001 | 18525 (1938) | 2.4% | .276 |
| Conversion THA for failed femoral neck fracture fixation (n = 12) | 25508 (9644) | 22.1% | .013 | 36503 (14200) | 21.7% | .020 | 18179 (2168) | 0.4% | .890 |
| Conversion THA for failed acetabular fracture fixation (n = 11) | 29958 (16818) | 43.4% | .007 | 44025 (26304) | 46.8% | .006 | 18446 (2057) | 1.9% | .675 |
| Conversion THA for failed subtrochanteric, intertrochanteric, and proximal femur fracture fixation (n = 7)c | 23879 (7758) | 14.3% | .364 | 35506 (12340) | 18.4% | .264 | 19018 (1664) | 5.1% | .429 |
| Conversion THA for other causes (AVN, developmental hip dysplasia, or SCFE; n = 12)d | 23281 (5952) | 11.4% | .220 | 33508 (7249) | 11.7% | .140 | 18546 (1991) | 2.5% | .463 |
| Conversion THA for patients with history of hip joint infection (pji + history of resection; n = 9)e | 32188 (7707) | 54.0% | <.001 | 47412 (11643) | 58.1% | <.001 | 18669 (1942) | 3.1% | .302 |
| Conversion THA for failed femur-related fracture fixation (n = 19)f | 24908 (8806) | 19.2% | .040 | 36136 (13199) | 20.5% | .035 | 18488 (1992) | 2.1% | .531 |
| Conversion THA for All failed fracture fixations (n = 30)g | 26760 (12321) | 28.1% | .016 | 39028 (19018) | 30.1% | .013 | 18473 (1980) | 2.1% | .502 |
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).