Value of negative pressure sealing drainage on wound healing of Gustilo IIIB and IIIC open fractures

Table 1 General clinical data of the patients

General clinical information		Study group, n = 40	Control group, n = 40	t/χ2	P value
Sex	Male	36	34	0.457	0.499
	Female	4	6
Mean age in yr		45.90 ± 2.82	45.24 ± 3.05	1.005	0.318
Time between healings in h		6.24 ± 0.95	6.01 ± 0.47	1.432	0.156
Degree of injury	IIIB	23	25	0.208	0.648
	IIIC	17	15
Cause of injury	Crush injuries	13	15	0.365	0.554
	Car accident injuries	16	14
	Machine strangulation	10	16
	Other	1	5

Data are mean ± standard deviation. Control group: Received conventional dressing change; Study group: Received negative pressure closed drainage.