Research Article
The Role of Immune Regulatory Cells in Nontraumatic Osteonecrosis of the Femoral Head: A Retrospective Clinical Study
Table 1
The demographics of patients with ONFH.
| Demographic | No./mean (SD) |
| Patients (M/F) | 67 | Unilateral | 32 | Bilateral | 35 | Hips | 102 | Male | 52 | Female | 15 | Mean age (year) | 43.6 (12.9) | Mean BMI (kg/m2) | 24.1 (3.3) | Mean HHS (score) | | Left | 75.6 (16.6) | Right | 75.0 (18.0) | Mean length of disease history (month) | 25.0 (53.0) | Etiology | | Idiopathic | 29 | Corticosteroids | 16 | Alcohol | 22 | ARCO stage, hips | | Stage II | 16 | Stage III | 56 | Stage IV | 30 | CJFH classification, hips | | L1 | 19 | L2 | 14 | L3 | 67 | M | 0 | C | 2 |
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