Table 1 Baseline demographics of the 255 patients
From: Single use Negative Pressure Wound Therapy (NPWT) system in the management of knee arthroplasty
|  | NPWT (N = 160) | Conventional method (N = 95) | P value |
|---|---|---|---|
Age at surgery | 69.94 ± 8.33 | 69.96 ± 6.44 | 0.99 |
Sex | Â | Â | Â |
 Male | 60 (69.8) (37.5) | 26 (30.2) (27.4) | 0.10 |
 Female | 100 (59.2) (62.5) | 69 (40.8) (72.6) |  |
BMI | 27.07 ± 4.38 | 27.77 ± 4.12 | 0.31 |
 <30 | 128 (76.6) (84.8) | 39 (23.4) (73.6) | 0.10 |
 ≥30 | 23 (62.2) (15.2) | 14 (37.8) (26.4) |  |
 Unknown | 9 | 42 |  |
Primary medical history | Â | Â | Â |
 Diabetic | 14 (38.9) (8.8) | 22 (61.1) (23.2) | < 0.01* |
 No | 146 (66.7) (91.3) | 73 (33.3) (76.8) |  |
Side | Â | Â | Â |
 Left | 83 (62.4) (51.9) | 50 (37.6) (52.6) | 1.00 |
 Right | 77 (63.1) (48.1) | 45 (36.9) (47.4) |  |