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Table 2
Clinical and radiographic outcomes.
| DAA N = 40 | PA N = 40 | P-value | |
|---|---|---|---|
| Clinical outcome | |||
| Operative time (min) | 69.3 ± 15.0 (51–110) | 91.7 ± 25.3 (61–170) | <0.001† |
| Intraoperative blood loss (mL) | 137 (92–224) | 253 (171–377) | <0.001‡ |
| Total complication, n (%) | 0 | 3 (7.5) | 0.241§ |
| Intraoperative fracture, n (%) | 0 | 2 (5) | 0.494§ |
| Femoral fracture, n (%) | 0 | 1 (2.5) | |
| Acetabular fracture, n (%) | 0 | 1 (2.5) | |
| Infection, n (%) | 0 | 1 (2.5) | |
| Dislocation, n (%) | 0 | 0 | |
| Implant loosening, n (%) | 0 | 0 | |
| Revision surgery, n (%) | 0 | 2 (5) | 0.494§ |
| Radiographic outcome | |||
| Cup alignment | |||
| Inclination (degrees) | 38.7 ± 4.4 (31–51) | 36.6 ± 5.2 (25–47) | 0.055† |
| Anteversion (degrees) | 13.8 ± 4.8 (6–24) | 16.1 ± 5.1 (8–29) | 0.042† |
| Inclination within the “safe zone”, n (%) | 39 (97.5) | 35 (87.5) | 0.201§ |
| Anteversion within the “safe zone”, n (%) | 40 (100) | 37 (92.5) | 0.241§ |
| Both within safe zone, n (%) | 39 (97.5) | 32 (80.0) | 0.029§ |
| Stem alignment | |||
| Coronal plane (degrees) | 0.6 ± 1.6 (−2 to 5) | 0.2 ± 1.7 (−4 to 4) | 0.266† |
| Sagittal plane (degrees) | 1.1 ± 2.1 (−3 to 6) | −0.2 ± 2.0 (−5 to 4) | 0.006† |
| Coronal plane in neutral (−3 ≤ angle ≤ 3), n (%) | 38 (95.0) | 38 (95.0) | 1.000§ |
| Sagittal plane in neutral (−3 ≤ angle ≤ 3) , n (%) | 35 (87.5) | 37 (92.5) | 0.712§ |
| Leg length discrepancy (mm) | 2.9 ± 5.3 (−9 to 16) | 1.7 ± 5.6 (−10 to 15) | 0.325† |
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