Table 6.

Univariable logistic regression analysis assessing the relationship between the absence of identified ARDS risk factor and mortality before and after propensity score matching

	OR	95% IC	p value
ICU mortality before matching	0.70	0.52–0.94	0.02
ICU mortality after matching	0.84	0.55–1.27	0.40
Hospital mortality before matching	0.79	0.60–1.05	0.11
Hospital mortality after matching	0.89	0.60–1.31	0.55

ICU, intensive care unit