Table 3.

The incidence of ventilator associated pneumonia on clinical and demographic characteristics of the fifth day

Variables		Total samples	Ventilator associated pneumonia		P value
			N a	%
Sex	Male	113	48	42.5	P=0.149
	Female	55	17	30.9
Type of trauma	General Organ damage	42	21	25	P<0.65
	Neurological damage	77	38	45.2
	General & Neurological damage	49	25	29.8
Underlying disease	Positive	70	48	68.6	P<0.001
	Negative	98	17	17.3
Smoking	Yes	63	42	66.7	P<0.002
	No	105	23	21.9

Variables		Ventilator associated pneumonia		P value
		Infected M±SD a	Uninfected M±SD a
Age (year)		48.8±12.5	41.9±14.2	P<0.002
Duration of hospitalization		13.9±4	11.6±3.8	P<0.001

^aAbbreviations: N: number, M: Mean, SD: Standard deviation