Table 2 Surgical details
From: Single use Negative Pressure Wound Therapy (NPWT) system in the management of knee arthroplasty
Operation | NPWT (N = 160) | Conventional method (N = 95) | P value |
 UKA | 5 (50.0) (3.1) | 5 (50.0) (5.3) | 0.08 |
 TKA | 96 (58.5) (60.0) | 68 (41.5) (71.6) |  |
 Bilateral | 58 (74.4) (36.3) | 20 (25.6) (21.1) |  |
 Revision | 1 (50.0) (0.6) | 1 (50.0) (1.1) |  |
 UKA + PFA | 0 | 1 (100.0) (1.1) |  |
 Unilateral | 102 (57.6) (63.7) | 75 (42.4) (78.9) | 0.02* |
 Bilateral | 58 (74.4) (36.3) | 20 (25.6) (21.1) |  |
Length of hospital stay (days) | Â | Â | Â |
 All patients | 5.18 ± 0.87 | 4.55 ± 2.11 | 0.01* |
 Unilateral | 4.84 ± 0.70 | 4.50 ± 2.16 | 0.19 |
 Bilateral | 5.79 ± 0.83 | 4.78 ± 1.93 | 0.04* |