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TABLE 4

Infants Who Had Been Breastfed at Any Time: Regression Coefficients, SEs, CIs, P Values, and Adjusted P Values for Each Predictor and Control Variable for Wave 4 MR Scores (n = 4679)

VariableaB CoefficientSE95% CIPAdjusted Pb
Intercept 2.88 2.14 −1.32 to 7.09 .18 N/A 
Child’s age wave 4 1.83 0.29 1.27 to 2.40 <.001 <.001 
Mother’s modified AUDIT-C score wave 1c −0.11 0.03 −0.18 to −0.04 .001 .01 
Average daily cigarettes while pregnant −0.05 0.03 −0.12 to 0.02 .13 .46 
Pregnancy: average d per wk drinking alcohol 0.19 0.14 −0.08 to 0.46 .16 .46 
Child’s birth wt <0.001 <0.001 <0.001 to <0.001 .17 .46 
Pregnancy: average No. drinks 0.22 0.17 −0.12 to 0.55 .21 .48 
Learning difficulty wave 4 −1.51 1.55 −4.66 to 1.64 .34 .54 
Mother’s age wave 1 −0.01 0.02 −0.04 to 0.02 .35 .54 
Combined family income −0.03 0.03 −0.09 to 0.04 .38 .54 
Mother’s average daily cigarettes wave 1d 0.02 0.03 −0.03 to 0.07 .39 .54 
Breastfeeding duration <0.001 <0.001 <0.001 to 0.001 .48 .61 
Mother’s level of education 0.04 0.06 −0.08 to 0.15 .54 .63 
Head injury wave 4 0.86 1.56 −2.31 to 4.02 .59 .63 
Child’s sex −0.05 0.15 −0.33 to 0.24 .76 .76 
VariableaB CoefficientSE95% CIPAdjusted Pb
Intercept 2.88 2.14 −1.32 to 7.09 .18 N/A 
Child’s age wave 4 1.83 0.29 1.27 to 2.40 <.001 <.001 
Mother’s modified AUDIT-C score wave 1c −0.11 0.03 −0.18 to −0.04 .001 .01 
Average daily cigarettes while pregnant −0.05 0.03 −0.12 to 0.02 .13 .46 
Pregnancy: average d per wk drinking alcohol 0.19 0.14 −0.08 to 0.46 .16 .46 
Child’s birth wt <0.001 <0.001 <0.001 to <0.001 .17 .46 
Pregnancy: average No. drinks 0.22 0.17 −0.12 to 0.55 .21 .48 
Learning difficulty wave 4 −1.51 1.55 −4.66 to 1.64 .34 .54 
Mother’s age wave 1 −0.01 0.02 −0.04 to 0.02 .35 .54 
Combined family income −0.03 0.03 −0.09 to 0.04 .38 .54 
Mother’s average daily cigarettes wave 1d 0.02 0.03 −0.03 to 0.07 .39 .54 
Breastfeeding duration <0.001 <0.001 <0.001 to 0.001 .48 .61 
Mother’s level of education 0.04 0.06 −0.08 to 0.15 .54 .63 
Head injury wave 4 0.86 1.56 −2.31 to 4.02 .59 .63 
Child’s sex −0.05 0.15 −0.33 to 0.24 .76 .76 

N/A, not applicable.

a

VIF <10 for all variables.

b

Benjamini-Hochberg method.

c

Unadjusted B = −0.07; SE = 0.03; 95% CI: −0.12 to 0.01; P = .03.

d

Unadjusted B = −0.01; SE = 0.02; 95% CI: −0.04 to 0.02; P = .50.

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