TABLE 3. Multiple regression all patients, extubation failure.

	Odds ratio	95% CI	p
Model 1 (41/573 events)
Group (1 vs. 2)	2.42	1.19–4.94	0.02
Gestational age (1 week)	0.89	0.84–0.95	0.0006
Sex (male vs. female)	0.76	0.38–1.53	0.45
FiO2 prior to extubation × 100 (1 unit)	1.05	1.01–1.10	0.02
Model 2 (40/575 events)
Group (1 vs. 2)	2.69	1.30–5.56	0.008
Birth weight (1 kg)	0.65	0.47–0.90	0.009
Sex (male vs. female)	0.66	0.33–1.33	0.25
FiO2 prior to extubation × 100 (1 unit)	1.05	1.01–1.10	0.03

Note: Adjusted for sex, fractional inspiratory oxygen (FiO₂) prior to extubation, and gestational age (model 1) or birth weight (model 2).