| With Spider arm | Without Spider arm | Student’s t-test (p < 0.05) |
Surgery time (minutes) | 129 ± 16 | 122 ± 18 | n.s. |
Blood loss (ml) | 397 ± 172 | 477 ± 196 | n.s. |
Cup abduction angle (degree) | 40.9 ± 5.1 | 41.7 ± 5.6 | n.s. |
Cup anteversion (degree) | 13.7 ± 3.5 | 12.9 ± 3.9 | n.s. |
Leg length discrepancy (mm) | 1.85 ± 2.9 | 0.85 ± 3.7 | n.s. |