Table 6.
Multivariable survival analysis of patients who underwent THA via the direct anterior approach between 2007 and 2020 in the 6 participating hospitals according to multilevel time-to-event analysis
| Operation groups (procedures) | Hazard ratio (95% CI) a |
|---|---|
| 1–25 | 1.6 (1.1–2.4) b |
| 26–50 | 1.6 (1.1–2.5) b |
| 51–100 | 1.3 (0.9–1.9) |
| 101–150 | 1.0 (0.6–1.6) |
| 151–200 | 0.8 (0. –1.4) |
| > 200 | 1.0 (reference) |
a
Adjusted for age, sex, ASA score, BMI, head size, fixation method, and hospital in which the operation was performed.
b
p < 0.05.