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Table 1 Demographic data

From: Bone restoration after revision hip arthroplasty with femoral bone defects using extensively porous-coated stems with cortical strut allografts

ParametersAllografts group (n = 47)No allografts group (n = 75)P value
Male29 (61.7%)44 (58.7%)0.739
Age57.2 ± 16.5 (29–83)53.5 ± 17.4 (33–87)0.196
Follow-up6.4 ± 2.5 (2.3–11.5)6.0 ± 2.2 (2.2–11.8)0.302
Primary diagnosis0.958
 Osteonecrosis of the femoral head25 (53.2%)39 (52.0%) 
 Developmental dysplasia of the hip12 (25.5%)16 (21.3%) 
 Primary osteoarthritis6 (12.8%)11 (14.7%) 
 Femoral neck fractures3 (6.4%)7 (9.3%) 
 Rheumatoid arthritis1 (2.1%)2 (2.7%) 
Mean time from primary to revision THA9.3 ± 4.2 (1–18)8.9 ± 4.9 (0–17)0.824
Reason for revision0.575
 AL14 (29.8%)29 (38.7%) 
 PJI16 (34.0%)24 (32.0%) 
 PFF17 (36.2%)22 (29.3%) 
Fixation of previous femoral stems0.739
 Cement29 (61.7%)44 (58.7%) 
 Cementless18 (38.3%)31 (41.3%) 
Degree of femoral bone defects (Paprosky classification)0.106
 Type II9 (19.1%)20 (26.7%) 
 Type IIIA21 (44.7%)36 (48.0%) 
 Type IIIB12 (25.5%)19 (25.3%) 
 Type IV5 (10.6%)0 (0%) 
ETO utilized10 (21.3%)14 (18.7%)0.724
  1. Categorical variables are presented as numbers (percentage). Continuous variables are presented as the means ± standard deviations (range). AL aseptic loosening, PJI periprosthetic joint infection, PFF periprosthetic femoral fracture, ETO extended trochanteric osteotomy