Table II.
Clinical, radiological, psychological, and neurophysiological characteristics of the final study population (n = 250).
| Characteristic | Value |
|---|---|
| Involvement of only one femoral head, n (%) | 170 (68.0) |
| Aetiology of osteonecrosis, n (%) | |
| Alcohol | 71 (28.4) |
| Steroid | 77 (30.8) |
| Trauma | 61 (24.4) |
| Other* | 41 (16.4) |
| Median duration of osteonecrosis, mths (IQR) | 24.0 (9.8 to 30.0) |
| ARCO stage, n (%) | |
| I | 25 (10.0) |
| II | 63 (25.2) |
| III | 117 (46.8) |
| IIIa | 61 (24.4) |
| IIIb | 56 (22.4) |
| IV | 45 (18.0) |
| Bone marrow oedema, n (%) | 177 (70.8) |
| Joint effusion grade, n (%) | |
| 0 | 0 (0) |
| 1 | 54 (21.6) |
| 2 | 86 (34.4) |
| 3 | 110 (44.0) |
| Mean Pain Catastrophizing Scale score (SD) | 22.2 (12.5) |
| Median Generalized Anxiety Disorder-7 score (IQR) | 5.0 (3.0 to 9.0) |
| Median Patient Health Questionnaire-9 score (IQR) | 4.0 (2.0 to 6.0) |
| Median Central Sensitization Inventory score (IQR) | 21.0 (11.2 to 34.8) |
| Mean maximum hip pain score on numerical rating scale (SD) | 5.0 (1.6) |
*
Idiopathic osteonecrosis or secondary osteonecrosis from other conditions such as sickle cell disease.
ARCO, Association Research Circulation Osseous classification.