Unadjusted OR (95% CI) | Multivariate OR* (95% CI) | |
OI (per SD increase) | 1.89 (1.28 to 2.78) | 1.84 (1.12 to 3.04) |
Pao2/Fio2 (per SD decrease) | 1.57 (1.09 to 2.26) | 1.28 (0.82 to 2.02) |
Crs (per SD decrease) | 1.22 (0.86 to 1.72) | 1.23 (0.77 to 1.96) |
OR per standard deviation increase in OI (SD 57.8) and decrease in Pao2/Fio2 (SD 8.3) and Crs (SD = 10.3). Data were partially missing for 22 patients.
*Controlled for age, sex, presence of chronic obstructive pulmonary disease, pneumonia, trauma, use of vasopressors, pH and APACHE II score.
Crs, compliance; OI, oxygenation index; Pao2/Fio2, ratio of arterial oxygen partial pressure to inspired oxygen fraction.