American Academy of Pediatrics

TABLE 3

Infants Being Breastfed at Wave 1: Regression Coefficients, SEs, CIs, P Values, and Adjusted P Values for Each Predictor and Control Variable for Wave 4 MR Scores (n = 2009)

Variable^a	B Coefficient	SE	95% CI	P	Adjusted P^b
Intercept	3.98	3.02	−1.96 to 9.92	.19	N/A
Child’s age wave 4	1.64	0.40	0.85 to 2.44	<.001	<.001
Mother’s modified AUDIT-C score wave 1^c	−0.12	0.06	−0.23 to −0.01	.03	.22
Child’s birth wt	<0.001	<0.001	−0.001 to −<0.001	.12	.48
Pregnancy: average d per wk drinking alcohol	0.28	0.19	−0.09 to 0.65	.14	.48
Pregnancy: average No. drinks	0.27	0.25	−0.23 to 0.76	.30	.72
Learning difficulty wave 4	−1.72	1.67	−5.10 to 1.66	.31	.72
Combined family income	−0.04	0.05	−0.14 to 0.05	.36	.73
Mother’s age wave 1	0.02	0.02	−0.03 to 0.06	.44	.77
Average daily cigarettes while pregnant	−0.05	0.08	−0.20 to 0.10	.53	.81
Head injury wave 4	0.93	1.65	−2.40 to 4.25	.58	.81
Child’s sex	−0.08	0.22	−0.52 to 0.36	.72	.81
Breastfeeding duration	<0.001	<0.001	−<0.001 to <0.001	.72	.81
Mother’s level of education	0.02	0.08	−0.14 to 0.19	.77	.81
Mother’s average daily cigarettes wave 1^d	0.01	0.06	−0.10 to 0.13	.81	.81

Variable^a	B Coefficient	SE	95% CI	P	Adjusted P^b
Intercept	3.98	3.02	−1.96 to 9.92	.19	N/A
Child’s age wave 4	1.64	0.40	0.85 to 2.44	<.001	<.001
Mother’s modified AUDIT-C score wave 1^c	−0.12	0.06	−0.23 to −0.01	.03	.22
Child’s birth wt	<0.001	<0.001	−0.001 to −<0.001	.12	.48
Pregnancy: average d per wk drinking alcohol	0.28	0.19	−0.09 to 0.65	.14	.48
Pregnancy: average No. drinks	0.27	0.25	−0.23 to 0.76	.30	.72
Learning difficulty wave 4	−1.72	1.67	−5.10 to 1.66	.31	.72
Combined family income	−0.04	0.05	−0.14 to 0.05	.36	.73
Mother’s age wave 1	0.02	0.02	−0.03 to 0.06	.44	.77
Average daily cigarettes while pregnant	−0.05	0.08	−0.20 to 0.10	.53	.81
Head injury wave 4	0.93	1.65	−2.40 to 4.25	.58	.81
Child’s sex	−0.08	0.22	−0.52 to 0.36	.72	.81
Breastfeeding duration	<0.001	<0.001	−<0.001 to <0.001	.72	.81
Mother’s level of education	0.02	0.08	−0.14 to 0.19	.77	.81
Mother’s average daily cigarettes wave 1^d	0.01	0.06	−0.10 to 0.13	.81	.81

N/A, not applicable.

VIF <10 for all variables.

Benjamini-Hochberg method.

Unadjusted B = −0.045; SE = 0.05; 95% CI: −0.14 to 0.05; P = .35.

Unadjusted B = −0.02; SE = 0.03; 95% CI: −0.08 to 0.04; P = .49.

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