Table 1 Comparison of baseline characteristics of group A and group B
Baseline characteristics | Group A | Group B | p value |
|---|---|---|---|
No. of patients (hips) | 34(50) | 83(103) | Â |
Age (years; mean ± SD, [range]) | 41.6 ± 8 (23 to 58) | 35.7 ± 10.6 (18 to 59) | 0.0108 |
Sex (female/male) | 30/4 | 66/17 | 0.303 |
Follow-up (years; mean ± SD, range) | 12.9 ± 2.8 (7 to 16) | 9.3 ± 3 (7 to 16) | < 0.001 |
BMI (median, mean ± SD) | 23.8 ± 2.9 | 24.4 ± 2.6 | 0.2755 |
Operation duration (min, mean ± SD) | 102.3 ± 18.3 | 83 ± 19.5 | < 0.0001 |
Material cost (renminbi, mean ± SD) | 1080 ± 1587.1 | 13707.8 ± 3779.5 | < 0.0001 |
Intraoperative blood loss (ml, mean ± SD) | 169 ± 78 | 129.5 ± 67.2 | 0.0015 |
Etiologies (%) | Â | Â | 0.09 |
 Glucocorticoid | 12 (35.3%) | 31 (37.3%) |  |
 Alcoholic | 19 (55.9%) | 29 (34.9%) |  |
 Traumatic | 2 (5.9%) | 16 (19.3%) |  |
 Idiopathic | 1 (2.9%) | 7 (8.4%) |  |
Pre-ARCO stage (n, %) | Â | Â | 0.977 |
 IIA | 5 (10%) | 9 (8.7%) |  |
 IIB | 12 (24%) | 21 (20.4%) |  |
 IIC | 15 (30%) | 37 (35.9%) |  |
 IIIA | 8 (16%) | 15 (14.6%) |  |
 IIIB | 5 (10%) | 9 (8.7%) |  |
 IIIC | 5 (10%) | 12 (11.7%) |  |