Table 8 The wound complication rates between the two groups in routine primary THA
|  | Drain use (n = 4943) | No drain (n = 1724) | P value |
|---|---|---|---|
Non-infectious complications, N (%) | |||
 Fat liquefies and wound effusion | 186 (3.76%) | 63 (3.65%) | 0.838% |
 Wound necrosis | 47 (0.95%) | 19 (1.10%) | 0.585% |
 Hematoma | 103 (2.08%) | 37 (2.15%) | 0.876% |
Infectious complications, N (%) | |||
 Superficial wound infection | 52 (1.03%) | 19 (1.10%) | 0.861% |
 PJI within a month postoperatively | 4 (0.08%) | 2 (0.12%) | 1.000% |