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Table 1 Comparison of baseline characteristics of group A and group B

From: Long-term survival and clinical outcomes of non-vascularized autologous and allogeneic fibular grafts are comparable for treating osteonecrosis of the femoral head

Baseline characteristics Group A Group B p value
No. of patients (hips) 34(50) 83(103)  
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 (%)    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, %)    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%)  
  1. Note: BMI body mass index, Pre-ARCO stage preoperative Association Research Circulation Osseous stage, SD standard deviation