Table III.
Radiological outcomes of total hip arthroplasty by surgical approach and surgeon experience.
| Variable | Posterior approach | p-value | Anterior approach | p-value | ||
|---|---|---|---|---|---|---|
| Senior surgeon | New surgeon | Senior surgeon | New surgeon | |||
| Mean leg length discrepancy, mm (SD) | ||||||
| Planned | 0 (0) | 0.3 (3.9) | 0.470* | 0 (0) | 0.8 (1.2) | 0.690* |
| Postoperative | 3.2 (2.7) | 2.0 (2.7) | 0.087* | 2.7 (2.7) | 3.1 (3.3) | 0.580* |
| Difference | 3.2 (2.7) | 3.5 (3.5) | 0.103* | 1.7 (2.3) | 2.7 (2.7) | 0.126* |
| Outlier > 10 mm, n (%) | 1 (3.3) | 1 (3.3) | 1.000† | 0 (0) | 0 (0) | 1.000† |
| Mean acetabular component abduction, ° (SD) | ||||||
| Planned | 40 (0) | 40 (0) | 1.000* | 40 (0) | 39.9 (0.3) | 0.340* |
| Postoperative | 42.8 (4.9) | 41.3 (1.6) | 0.100* | 41.0 (1.8) | 40.4 (2.0) | 0.205* |
| Difference | 5.2 (2.1) | 1.6 (1.4) | < 0.001* | 1.6 (1.4) | 1.3 (1.4) | 0.420* |
| Outlier > 10°, n (%) | 0 (0) | 0 (0) | 1.000† | 0 (0) | 0 (0) | 1.000† |
| Mean acetabular component anteversion, ° (SD) | ||||||
| Planned | 24.5 (1.0) | 24.0 (3.4) | < 0.001* | 20 (0) | 21.7 (2.5) | 0.001* |
| Postoperative | 29.9 (4.4) | 23.3 (3.1) | < 0.001* | 21.6 (1.7) | 23.7 (3.6) | 0.004* |
| Difference | 5.3 (3.9) | 1.1 (1.3) | < 0.001* | 1.9 (1.3) | 2.0 (2.6) | 0.924* |
| Outlier > 10°, n (%) | 6 (20) | 0 (0) | 0.012† | 0 (0) | 1 (3.3) | 0.500† |
*
Independant-samples t-test
†
Fisher’s exact test
SD, standard deviation.