High levels of circulating leukocyte microparticles are associated with better outcome in acute respiratory distress syndrome

Table 3 Baseline respiratory and hemodynamic parameters of the 52 ARDS patients

Variables	Survivors	Non-survivors	P-value
	( n = 31)	( n = 21)
PaO2/FiO2 (mmHg) (mean ± SD)	114 ± 34	106 ± 33	0.4
PaCO2 (mmHg) (median (IQR))	43 (40 to 57)	46 (40 to 52)	0.6
FiO2 (mean ± SD)	0.69 ± 0.14	0.75 ± 0.18	0.2
Total PEEP (cmH₂O) (mean ± SD)	11.5 ± 2.7	13.2 ± 3.4	0.7
P plat (cmH₂O) (mean ± SD)	25.9 ± 6.1	27.7 ± 6.8	0.3
qsComp (mL.cmH₂O^-1) (mean ± SD)	33.8 ± 13.6	29.8 ± 10.9	0.2
MV (L/min) (mean ± SD)	9.5 ± 2.2	9.3 ± 2.6	0.7
TV (mL/Kg PBW) (median (IQR))	6.00 (6.00 to 6.20)	6.00 (6.00 to 6.05)	0.2
HR (beats/min) (mean ± SD)	105 ± 27	113 ± 25	0.3
MAP (mmHg) (mean ± SD)	74 ± 17	68 ± 14	0.2
Arterial pH (median (IQR))	7.34 (7.28 to 7.43)	7.26 (7.18 to 7.35)	0.01
Vasopressor (μg.kg^-1.minute^-1) (median (IQR))	0.22 (0.08 to 0.50)	0.36 (0.15 to 0.88)	0.2

FiO2, fraction of the inspired oxygen; HR, heart rate; MAP, mean arterial pressure; vasopressor was norepinephrine or epinephrine; MV, minute ventilation; PaCO2, partial pressure of carbon dioxide; PaO2/FiO2, ratio of the partial pressure of arterial oxygen and the fraction of the inspired oxygen; PBW, predicted body weight; PEEP, positive end-expiratory pressure; Pplat, plateau pressure; qsComp, quasi-static respiratory compliance; TV, tidal volume.
Results are expressed as mean ± SD, or median (IQR) as appropriate.

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