Table 2. Multiple regression model for predictors of dampening in the Mayer wave frequency band.

Factor	β Coefficienta		P-value	VIF
	Unstandardized	Standardized
BW z-score	-0.04	-0.26	0.01*	1.07
EGA	-1.43	-0.48	<0.01*	1.07
African-American race	2.26	0.29	<0.01*	1.05
Prenatal care	-1.33	-0.15	0.13	1.09
IVH of any grade	2.55	0.31	<0.01*	1.16
Antenatal steroids	0.72	0.08	0.433	1.18
Chorioamnionitisb	-1.10	-0.23	0.02*	1.10

^*denotes significance at p ≤ 0.05. Model R² = 0.546, Adj. R²=0.487, p<0.01.

VIF-Variance inflation factor.

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

^bBased on histologic examination of the placenta.