Of 789 patients without ARDS on the first day of mechanical ventilation ... 95% CI, 1.2 to 1.7); PEEP (OR, 1.4 per SD; 95% CI, 1.2 to 1.7); sepsis (OR, 1.95; 95% CI, 1.3 to 2.9); VT (OR, 1.4 ...