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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)

VariableaB CoefficientSE95% CIPAdjusted Pb
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 1c −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 1d 0.01 0.06 −0.10 to 0.13 .81 .81 
VariableaB CoefficientSE95% CIPAdjusted Pb
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 1c −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 1d 0.01 0.06 −0.10 to 0.13 .81 .81 

N/A, not applicable.

a

VIF <10 for all variables.

b

Benjamini-Hochberg method.

c

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

d

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

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