Table 1 Comparison of complication incidence in different groups
|  | Nonunion (n = 18, 15.9%) | ONFH (n = 25, 22.1%) | Fixation failure (n = 10, 8.8%) | Reoperation (n = 28, 24.8%) | ||||
|---|---|---|---|---|---|---|---|---|
Present | P value | Present | P value | Present | P value | Present | P value | |
Gender (No, %) | ||||||||
 Male | 14 (2) | 0.082* | 12 (18) | 0.193* | 8 (12) | 0.290* | 16 (24) | 0.790* |
 Female | 4 (9) |  | 13 (28) |  | 2 (4) |  | 12 (26) |  |
Fracture side (No, %) | ||||||||
 Left | 10 (17) | 0.757* | 14 (24) | 0.667* | 6 (10) | 0.853* | 15 (25) | 0.868* |
 Right | 8 (15) |  | 11 (20) |  | 4 (7) |  | 13 (24) |  |
Fracture displacement (No, %) | ||||||||
 Nondisplaced | 2 (4) | 0.007* | 5 (11) | 0.022* | 1 (2) | 0.093* | 5 (11) | 0.006* |
 Displaced | 16 (24) |  | 20 (29) |  | 9 (13) |  | 23 (34) |  |
Fracture stability (No, %) | ||||||||
 Stable | 7 (10) | 0.035* | 13 (19) | 0.292* | 2 (3) | 0.014* | 12 (17) | 0.023* |
 Unstable | 11 (25) |  | 12 (27) |  | 8 (18) |  | 16 (36) |  |
Fixation configuration (No, %) | ||||||||
 Triangle | 8 (16) | 0.920* | 12 (25) | 0.596* | 6 (12) | 0.437* | 12 (25) | 0.950* |
 Inverted triangle | 10 (16) |  | 13 (20) |  | 4 (6) |  | 16 (25) |  |
Screw number (No, %) | ||||||||
 3 | 17 (16) | 0.587# | 24 (22) | 1.000# | 10 (9) | 1.000# | 27 (25) | 1.000# |
 4 | 1 (20) |  | 1 (20) |  | 0 (0) |  | 1 (20) |  |
Age (No, %) | ||||||||
  ≤ 60 | 14 (16) | 1.000* | 20 (22) | 0.960* | 7 (8) | 0.702* | 22 (24) | 0.871* |
  > 60 | 4 (17) |  | 5 (22) |  | 3 (13) |  | 6 (26) |  |