TABLE 4

Perinatal factors associated with Scond

	Univariable model			Multivariable model^#
	B	95% CI	p-value	B	95% CI	p-value
Gestational age weeks	−0.001	−0.002–−0.001	<0.001	−0.001	−0.002–−0.001	<0.001
No-ELGAN/ELGAN	0.010	0.005–0.015	<0.001	0.010	0.005–0.015	<0.001
BPD absent/present	0.013	0.009–0.018	<0.001	0.005	−0.003–0.013	0.26
Supplementary oxygen days	0.0001	0.0001–0.0002	<0.001	0.0001	0.0001–0.0001	0.072
Respiratory support days	0.0003	0.0002–0.0004	<0.001	−0.0001	−0.0002–0.0001	0.50
Intubation days	0.0003	0.0001–0.0007	0.049	0.0001	−0.0003–0.0003	0.89
Surfactant no/yes	0.012	0.006–0.017	<0.001	0.003	−0.003–0.009	0.30
Antenatal steroids no/yes	0.010	0.005–0.015	<0.001	−0.005	−0.012–0.002	0.18

Univariable and multivariable regression models for Scond. The only remaining significantly associated perinatal factor with Scond in the multivariable model was gestational age (r² 37%) and extremely low gestational age neonates (ELGAN) (r² 20%). BPD: bronchopulmonary dysplasia. ^#: adjusted for gestational age, body length and sex.