Table 7. Mortality ratio for positive growth and sterile organisms on the basis of samples.

ET: endotracheal

Organism	ET (N = 186)		Urine (N = 194)		Blood (N = 197)
	Number	Mortality	Number	Mortality	Number	Mortality
Positive growth	128	50 (39.0%)	57	20 (35.1%)	37	21 (56.8%)
Sterile	58	20 (34.4%)	137	50 (36.5%)	160	49 (30.6%)
P-value	0.550		0.851		0.002