Table 1.
Parameter | Value |
---|---|
Number of patients (hips) | 63 (75) |
Percentage of bilateral hips | 16 |
Age at surgery (years) | 29.3 ± 11.6 (13–56) |
Gender (percent male of all hips) | 23 |
Side (percent right of all hips) | 49 |
Weight (kg) | 61 ± 11.4 (41–86) |
Height (cm) | 166 ± 8.6 (149–186) |
Body mass index (kg/m2) | 22.1 ± 3.1 (15.8–28.2) |
Operation time (hours) | 3.5 ± 0.73 (2.0–5.0) |
Blood loss (L) | 2.0 ± 0.86 (0.8–4.5) |
Red blood cell concentrates (units) | 3.8 ± 1.93 (1–11) |
Concomitant intertrochanteric osteotomy (percent) | 21 |
Previous surgery to attempt sufficient coverage (percent) | 31 |
Sphericity index [48] (percent) | 79 ± 9.1 (53–95) |
Severin classification [44] (percent) | |
Class 1 | — |
Class 2 | 1 |
Class 3 | 50 |
Class 4 | 44 |
Class 5 | 5 |
Class 6 | — |
Preoperative osteoarthritis score according to Tönnis [55] (percent) | |
Grade 0 | 43 |
Grade 1 | 33 |
Grade 2 | 21 |
Grade 3 | 3 |
Values of continuous parameters are expressed as mean ± standard deviation with range in parentheses.