Table 5:

Distribution of sternal wound infections among the matched controls and the closed-incision negative pressure therapy group

	Control group (n = 766)	ciNPT group (n = 766)	P-value
Total patients with SWI	119 (15.5%)	43 (5.6%)	0.0001
Superficial SWI	88 (11.4%)	29 (3.7%)	0.0001
Deep SWI	31 (4.04%)	14 (1.8%)	0.0149
SWI classification *
Type 1A	63 (8.2%)	20 (2.6%)	0.0001
Type 1B	25 (3.2%)	9 (1.17%)	0.0084
Type 2A	15 (1.9%)	10 (1.3%)	0.4206
Type 2B	6 (0.78%)	4 (0.52%)	0.7531
Type 3A	7 (0.91%)	0	0.0154
Type 3B	3 (0.39%)	0	0.2495
Treatment administered
Antibiotics	119(15.5%)	43(5.6%)	0.0001
Debridement	19(2.5%)	7(0.91%)	0.0278
Rewiring	13(1.7%)	4(0.52%)	0.0479
NPWD	28(3.6%)	9(1.17%)	0.0023
Plastic surgical intervention	7(0.91%)	0	0.0154

NPWD: negative pressure wound dressing ; SWI: sternal wound infection .

^*SWI classification is described in Table 1.