Respiratory mechanics, ventilator-associated pneumonia and outcomes in intensive care unit

Table 3 Numeric variables and ventilator-associated pneumonia

Variables	VAP		P value
	Yes	No
APACHE II1	29.2 ± 5.6	26.5 ± 7.1	0.026
Age (yr)	57.1 ± 19.1	59.2 ± 19.6	0.565
1st day (n = 120)
PaO2/FiO2 (mmHg)1	232.3 ± 79.9	237.8 ± 105.2	0.756
Compliance-VCV (mL/cmH2O)	43.1 ± 14.9	39.8 ± 11.6	0.365
Resistance-VCV (cmH2O/L/s)	13.7 ± 5.0	13.0 ± 4.8	0.594
Compliance-PCV (mL/cmH2O)1	34.8 ± 10.4	35.1 ± 9.8	0.879
Resistance-PCV (cmH2O/L/s)	23.6 ± 10.3	29.0 ± 18.1	0.114
5th day (n = 77)
PaO2/FiO2 (mmHg)1	244.1 ± 94.1	240.2 ± 86.1	0.850
Compliance-VCV (mL/cmH2O)	43.3 ± 14.0	37.6 ± 12.3	0.092
Resistance-VCV (cmH2O/L/s)	13.9 ± 6.8	13.8 ± 5.5	0.996
Compliance-PCV (mL/cmH2O)1	33.6 ± 8.9	32.5 ± 9.6	0.606
Resistance-PCV (cmH2O/L/s)	27.1 ± 11.7	25.9 ± 12.0	0.777
(n = 120)
Duration of MV (d)	18.4 ± 14.9	10.7 ± 6.8	0.001
Length of stay in ICU (d)	20.4 ± 15.3	12.8 ± 7.6	0.003

Mann-Whitney U-test;

¹Student’s t-test. Source: Prepared by the author, 2013. VAP: Ventilator-associated pneumonia; VCV: Volume-controlled ventilation; PCV: Pressure-controlled ventilation; MV: Mechanical ventilation; ICU: Intensive care unit.