Table 5.

Multivariable logistic regression analysis of risk factors for BPD.

Variable	β	P	OR	95% CI
BW (g)	–0.002	0.008	0.998	0.996–0.999
Male	0.472	0.025	1.603	1.061–2.424
ANS	–0.549	0.011	0.577	0.379–0.880
DRI	0.739	0.001	2.094	1.328–3.303
Administration of PS in delivery room	–1.297	<0.001	0.273	0.160–0.467
RDS receiving ≥2 doses of PS	0.993	<0.001	2.700	1.679–4.343
MV duration ≥7 days	1.472	<0.001	4.358	2.777–6.837
Constant	1.510	0.547	4.525

ANS: Antenatal steroid; CI: Confidence interval; BPD: Bronchopulmonary dysplasia; BW: Birth weight; DRI: Delivery room intubation; MV: Mechanical ventilation; OR: Odds ratio; PS: Pulmonary surfactant; RDS: Respiratory distress syndrome.