TABLE 4.

Secondary end points and outcome measures

	ZEEP=0 cmH2O (n=33)	PEEP=5 cmH2O (n=30)	P
Days of intubation, mean ± SD	9.2±8.5	9.2±8.8	0.79
Patient mortality/survival, n (%)
Mortality <28 days	14 (42)	9 (30)	0.39
Mortality ≥28 days	2 (6)	3 (10)	0.75
Surviving	17 (52)	18 (60)	0.56
Mortality of hypotensive patients, n/n (%)	10/16 (62.5)	6/16 (37.5)	0.29

PEEP Positive end-expiratory pressure; ZEEP Zero end-expiratory pressure