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Table 3 Multiple regression analysis for indicators of environmental risk predicting Conduct Disorder symptoms:

From: Effects of low birth weight, maternal smoking in pregnancy and social class on the phenotypic manifestation of Attention Deficit Hyperactivity Disorder and associated antisocial behaviour: investigation in a clinical sample

  R2 Unstandardised Standardised   
   Beta Standard error Beta t p-value
Constant - 0.55 0.33 - 1.70 0.09
Smoking in pregnancy 0.04 0.21 0.06 0.18 3.34 0.001
Social class 0.02 0.07 0.04 0.09 1.72 0.09
Birth weight 0.007 -0.0004 0.001 -0.10 -1.89 0.06
Gender 0.02 -0.28 0.10 -0.15 -2.84 0.005
Verbal IQ 0.02 -0.004 0.003 -0.09 -1.68 0.09
ADHD symptoms 0.01 0.02 0.01 0.10 1.85 0.07