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

Table 4 Numeric variables and death

Variables	Outcome		P value
	High	Death
APACHE II1	27.0 ± 7.6	27.7 ± 5.8	0.606
Age (yr)	51.1 ± 19.9	65.4 ± 16.1	< 0.001
1st day (n = 120)
PaO2/FiO2 (mmHg)1	263.1 ± 100.9	210.7 ± 87.8	0.003
Compliance-VCV (mL/cm H2O)	43.5 ± 12.5	38.4 ± 12.6	0.015
Resistance-VCV (cm H2O/L/s)	13.3 ± 4.3	13.2 ± 5.4	0.935
Compliance-PCV (mL/cm H2O)1	36.6 ± 9.8	33.6 ± 9.9	0.103
Resistance-PCV (cm H2O/L/s)	25.0 ± 10.5	29.4 ± 20.0	0.416
5th day (n = 77)
PaO2/FiO2 (mmHg)1	268.8 ± 81.9	214.7 ± 87.9	0.004
Compliance-VCV (mL/cm H2O)	40.7 ± 12.7	38.7 ± 13.7	0.356
Resistance-VCV (cm H2O/L/s)	14.2 ± 5.0	13.5 ± 6.9	0.22
Compliance-PCV (mL/cm H2O)1	34.1 ± 9.4	31.8 ± 9.1	0.282
Resistance-PCV (cm H2O/L/s)	25.7 ± 10.8	27.1 ± 12.9	0.76
(n = 120)
Duration of MV (d)	14.5 ± 12.4	11.9 ± 8.6	0.212
Length of stay in ICU (d)	18.3 ± 12.5	12.4 ± 8.9	< 0.001

Mann-Whitney U-test;

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