Table 3.

Regression Coefficients of Predictors of BRS Total at 18 and 30 Months

Variable	18 Months			30 Months
	B	SE	β	B	SE	β
Gestational age	−0.10	0.67	−0.01	0.41	0.66	0.02
Birth weight > 750g	−0.89	2.55	−0.01	5.00*	2.49	0.08
Female	6.94**	2.26	0.11	4.96*	2.20	0.08
Maternal age	−0.14	0.18	−0.03	−0.16	0.17	−0.04
Maternal income
≥ $40,000	9.18**	3.23	0.14	7.81*	3.16	0.11
$20,000–$39,999	4.46	2.88	0.06	5.29	2.82	0.07
Maternal education
Some college	1.55	3.24	0.03	6.56*	3.17	0.10
HS graduate	1.07	3.28	0.02	2.76	3.21	0.04
IVH/PVL	−1.97	3.28	−0.02	−4.27	3.20	−0.05
BPD	−5.62*	2.51	−0.09	−4.27	2.46	−0.07
NEC	−2.06	4.11	−0.02	−0.18	4.02	0.00
Late sepsis	0.93	2.45	0.01	0.65	2.40	0.01
Early intervention by 18 months	−4.52	2.44	−0.07	−3.32	2.38	−0.05

Note: N = 539; B = unstandardized coefficient; SE = standard error coefficient; β = standardized coefficient.

^*p ≤ .05

^**p > .01

^***p < .001.

All variables were entered simultaneously and each model controls for study site. Reference categories are male, birth weight ≤ 750g, mother income < $20,000, mother does not have a HS diploma, no IVH/PVL, no BPD, no NEC, no late sepsis, and had not received early intervention by 18 months of age.