. Author manuscript; available in PMC: 2016 May 18.

Published in final edited form as: Pediatr Res. 2015 Nov 16;79(3):453–459. doi: 10.1038/pr.2015.238

Table 4. Binary logistic regression model for predictors of IVH, all grades.

Factor	β Coefficient^a		P-value	VIF
	Unstandardized	Standardized
BW z-score	-0.04	2.62	0.01^*	1.50
Dampening	0.34	2.96	<0.01^*	2.07
EGA	0.38	1.16	0.37	1.81
Vaginal delivery	1.39	1.53	0.11	1.22
Antenatal steroids	-1.84	-1.71	0.07	1.22
Chorioamnionitis^b	1.27	1.34	0.16	1.30
Fentanyl exposure	2.47	2.60	<0.01^*	1.43

denotes significance at p ≤ 0.05. Model R² = 0.39, Adj. R²=0.28, p<0.01.

VIF-Variance inflation factor.

Increase or decrease in magnitude of dampening from the mean (dB).

Based on histologic examination of the placenta.