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Infant Child Dev. Author manuscript; available in PMC 2017 March 28.
Published in final edited form as:
Infant Child Dev. 2006 December 12; 15(6): 593–606.
doi: 10.1002/icd.480

Table 3

Hierarchical linear regressions: prediction of cognitive task performance by maternal smoking during pregnancy (MSP), birth weight, and sociodemographic factors

Outcome variableIndependent variable(s)BSEβp
WPPSI-R blocks
 Block 1MSP−0.100.033−0.0750.003
 Block 2MSP−0.090.034−0.0700.006
Birth weight0.030.0260.0270.297
 Block 3 (stepwise)aMSP−0.010.035−0.0060.826
Birth weight0.020.0260.0200.440
Maternal education0.130.0290.136< 0.001
Family income0.090.0290.0870.003
 Block 1MSP−0.170.034−0.126< 0.001
 Block 2MSP−0.160.035−0.118< 0.001
Birth weight0.050.0270.0460.073
 Block 3 (stepwise)bMSP−0.010.035−0.0060.805
Birth weight0.040.0260.0350.153
Maternal education0.210.0290.208< 0.001
Responsiveness0.130.0290.111< 0.001
Family income0.130.0290.126< 0.001
Family dysfunction−0.060.028−0.0550.024
 Block 1MSP−0.170.035−0.121< 0.001
 Block 2MSP−0.150.035−0.111< 0.001
Birth weight0.060.0270.0610.018
 Block 3 (stepwise)cMSP−0.040.036−0.0280.296
Birth weight0.050.0270.0510.041
Maternal education0.180.0300.176< 0.001
Family income0.090.0300.0880.002

Data courtesy of the Institut de la Statistique du Québec.

aFinal model WPPSI-R blocks (Wechsler Preschool and Primary Scale of Intelligence-Revised block design): F(4, 1536) = 16.2, p<0.001, R2 = 0.041, excluded variables: responsiveness, involvement, family dysfunction.
bFinal model PPVT (Peabody Picture Vocabulary Test): F(6, 1534) = 36.1, p<0.001, R2 = 0.124, excluded variable: involvement.
cFinal model VCR (Visually Cued Recall): F(5, 1535) = 24.0, p<0.001, R2 = 0.072, excluded variables: involvement, family dysfunction.