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Table 2 Univariate linear regression analysis for indicators of environmental risk predicting inattentive 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
Smoking in pregnancy < 0.001 0.06 0.18 -0.02 -0.36 0.72
Social class 0.001 0.07 0.12 0.03 0.58 0.56
Birth weight <0.001 0.00001 0.0001 -0.006 -0.11 0.91