Table 4 Clinical outcomes
From: Single use Negative Pressure Wound Therapy (NPWT) system in the management of knee arthroplasty
|  | NPWT (N = 160) | Conventional method (N = 95) | P value |
|---|---|---|---|
Blisters | Â | Â | Â |
 Yes | 8 (40.0) (5.0) | 12 (60.0) (12.6) | 0.05* |
 No | 152 (64.7) (95.0) | 83 (35.3) (87.4) |  |
Main wound complications | Â | Â | Â |
 None | 160 (69.6) (100.0) | 70 (30.4) (73.7) | < 0.01* |
 Itchiness | 0 | 6 (100.0) (6.3) |  |
 Soiled | 0 | 6 (100.0) (6.3) |  |
 Wound review | 0 | 10 (100.0) (10.5) |  |
 Pain, rash, soaked or re-admitted | 0 | 3 (100.0) (3.3) |  |
Dressing change and reasons | Â | Â | Â |
 Yes | 4 (14.8) (2.5) | 23 (85.2) (24.2) | < 0.01* |
Reasons | Â | Â | Â |
 Air leak | 2 (100.0) (1.3) | 0 | < 0.01* |
 Blisters | 1 (25.0) (0.6) | 3 (75.0) (3.2) |  |
 Machine wet | 1 (100.0) (0.6) | 0 |  |
 Wound review | 0 | 9 (100.0) (9.5) |  |
 Contaminated, itchiness, loosened | 0 | 7 (100.0) (7.4) |  |
 Change after shower, others | 0 | 4 (100.0) (4.2) |  |
No | 156 (68.4) (97.5) | 72 (31.6) (75.8) | Â |