Table 4.

Univariate and multivariate analyses of the association between skin maturity and the need for ventilatory support during the first 72 hours of life.

Variable	Univariate analysis			Multivariate analysis
	ORa (95% CI)	P value (Wald test)	R2	OR (95% CI)	P value (Wald test)	R2
Skin reflectionb	0.983 (0.981-0.986)	<.001	0.598	0.996 (0.992-0.999)	.01	0.814
Birth weight	0.996 (0.995-0.993)	<.001	0.801	0.997 (0.996-0.998)	<.001
ACTMFc	56.108 (33.307-94.520)	<.001	0.607	2.677 (1.209-5.924)	.01

^aOR: odds ratio.

^bOR and 95% CI values for skin reflection are × 10³.

^cACTMF: antenatal corticosteroid therapy for fetal maturation exposition.