survivors non-survivors p value
Male, n (%) 9/13 (69.2) 8/16 (50) 0.296∗
Age (± Sd) 53±20.94 52±17.17 0.944&
Ventilator days, n (%) 8.46±1.56 15.63±2.63 < 0.01&
PaO2/FiO2 ratio (±SD) 105.23 ±21.89 66.63±9.75 < 0.01&
Vasoactive drug, n (%) 1/13 (7.7) 9/16 (56.3) < 0.01&
SAPS II score (±Sd) 39.31 ± 6.92 51.44 ± 10.84 < 0.01&
APACHE II (±Sd) 14.38 ± 2.29 21.75 ± 3.23 < 0.01&
Ever smoker, n (%) 5/13 (38) 6/16 (38) > 0.05*
Chronic pulmonary diseases, n (%) 2/13 (15) 3/16 (19) > 0.05