Table 2. Clinical characteristics of the affected hips of all ONFH patients in LPFH and non-LPFH groups in this study.
| LPFH group | non-LPFH group | |
|---|---|---|
| n (hips) | 23 | 28 |
| Duration of hip symptoms (month) | 6.1 ± 5.3 | 5.0 ± 3.9 |
| CJFH classification (hips) | M, 0; C, 4; L1, 19 | L2, 11; L3, 17 |
| ARCO stage lesions (hips) | ||
| Stage I | 3 | 0 |
| Stage II | 14 | 7 |
| Stage III | 6 | 21 |
| Medical history: Femoral neck fractures (n) | ||
| Delbet type (I:II:III) | 3:14:6 | 2:17:9 |
| Anesthesia method (ESA:GA) | 15:8 | 22:6 |
| Operation time (min) | 41.2 ± 6.4 | 38.8 ± 8.3 |
| Intraoperative blood loss (mL)* | 31.7 ± 9.1 | 35.6 ± 7.8 |
| Length of follow-up (year) | 6.4 ± 1.8 | 6.9 ± 2.3 |
Note: CJFH, China–Japan Friendship Hospital; ARCO, Association Research Circulation Osseous; ESA, epidural spinal anesthesia; GA, general anesthesia. *Without bone marrow aspirated from the anterior iliac crest.