Table 1.
Demographics and diagnosis for patients with and without cortical hypertrophies
| Hips with CHs | Hips without CHs | p-value | |
|---|---|---|---|
| Demographics | |||
| Number of hips | 105 | 83 | |
| Gender (m: w) | 57: 48 | 29: 44 | 0.32 |
| Age at surgery in years | 61 (53–68) | 60 (51–68) | 0.92 |
| BMI (kg/m2) | 26 (23–28) | 26 (24–28) | 0.46 |
| HHS preoperatively | 59 (43–67) | 62 (48–69) | 0.25 |
| HHS postoperatively (3.3y FU) | 97 (93–100) | 97 (92–100) | 0.89 |
| HHS postoperatively (7.7y FU) | 98 (93–100) | 96 (91–100) | 0.47 |
| UCLA Score preoperatively | 4 (3–6) | 5 (3–6) | 0.15 |
| UCLA Score postoperatively (3.3y FU) | 7 (6–7) | 7 (6–8) | 0.35 |
| UCLA Score postoperatively (7.7y FU) | 7 (5–7) | 7 (5–7) | 0.79 |
| Diagnosis | |||
| Primary osteoarthritis | 61 | 46 | 0.71 |
| Developmental dysplasia | 22 | 28 | 0.05 |
| Avascular necrosis | 10 | 4 | 0.22 |
| Posttraumatic osteoarthritis | 4 | 1 | 0.27 |
| Rheumatoid arthritis | 5 | 4 | 0.93 |
| Others | 3 | 0 | 0.12 |
CH cortical hypertrophy, FU follow up; median values (interquartile range)