. Author manuscript; available in PMC: 2015 Aug 25.

Published in final edited form as: Comput Med Public Health Biotechnol (1994). 1995;5(3):1469–1487.

Table 2.

Stepwise Regression; Predictive Model Variables

Variable Name	MDI (set1)	MDI (set2)	MDI (set3)	PDI (set 1)	PDI (set 2)	PDI (set 3)
Total Days on Supplemental Oxygen	x	x	x	x	x	x
Intra-Ventricular hemorrhaging		x			x	x
Sum of NEURAL to MENING	x	x	x	x	x	x
Maternal Cocaine			x		x	x
Multiple Birth	x	x	x	x	x	x
Bronchopulmonary Dysplasia			x	x	x
Very Low Birthweight without BPD	x					x
Gestational Age in weeks						x
Social Economic Status	x	x	x		x
Race	x	x	x
Birthweight	x
Primary Caregiver is Biological Mother		x		x	x	x
Mother's Age at Birth						x
Mother's Education	x	x	x	x	x

Coefficient of Determination (R²)	0.34	0.34	0.33	0.36	0.38	0.36
Total Degrees of Freedom (DF)	138	132	139	139	133	139

x = Stepwise Regression Selected Variables