Skip to main content
. Author manuscript; available in PMC: 2012 Apr 1.
Published in final edited form as: Early Hum Dev. 2011 Feb 12;87(4):247–252. doi: 10.1016/j.earlhumdev.2011.01.023

Table 3.

Hierarchical Multiple Regression Models of Possible Mediation of CBCL Broadband Total, Internalizing, and Externalizing T-scores by IQ

Outcome Predictors R2 p
(model)		 B SE B β p
(predictor)
Totala .184 < .001*
BW −.004 .001 −.429 < .001*
Totalb .194 < .001*
BW −.004 .001 −.440 < .001*
SES 2.50 2.39 .102 .299
Totalc .245 < .001*
BW −.003 .001 −.312 .006*
SES .884 2.42 .036 .716
IQ −.178 .075 −.263 .021*
Internalizinga .129 .001*
BW −.004 .001 −.360 .001*
Internalizingb .147 .001*
BW −.003 .001 −.373 < .001*
SES 3.18 2.41 .133 .191
Internalizingc .161 .002*
BW −.003 .001 −.306 .010*
SES 2.34 2.51 .098 .353
IQ −.092 .078 −.139 .240
Externalizinga .05 .037*
BW −.002 .001 −.223 .037*
Externalizingb .051 .107
BW −.002 .001 −.227 .036*
SES .905 2.31 .042 .696
Externalizingc .079 .073
BW −.001 .001 −.132 .279
SES −.164 2.38 −.008 .945
IQ −.118 .074 −.196 .115

Outcomes are T-scores for Total, Internalizing, and Externalizing scales. Higher T-scores indicate more behavior problems. B indicates unstandardized coefficient; SE B, standard error of B; β, standardized coefficient.

a

First Model. Step 1, BW (birth weight). For BW, lower BW was associated with higher behavior problems.

b

Second Model. Step 1, BW; step 2, SES. For SES, no significant associations with behavior problems.

c

Final model. Step 1, BW; step 2, SES; and step 3, IQ. For IQ, lower IQ was associated with higher behavior problems. When IQ is in the model, BW is no longer a significant contributor to Externalizing problems.