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Table 6 Performance on Measures of Impulsivity by Genotype and Significance values

From: Examining impulsivity as an endophenotype using a behavioral approach: a DRD2 TaqI A and DRD4 48-bp VNTR association study

  DRD2 DRD4 Interaction
  A1+ A1- p L+ L- p p
  Mean SE Mean SE   Mean SE Mean SE   
BIS Attentional Impulsivity 16.49 0.41 17.58 0.32 0.171 17.12 0.50 16.92 0.2975 0.791 0.223
BIS Motor Impulsivity 21.19 0.39 22.17 0.38 0.131 21.68 0.49 21.59 0.3311 0.933 0.510
BIS Non-planning Impulsivity 25.22 0.46 25.56 0.40 0.783 25.08 0.46 25.38 0.3807 0.636 0.660
BIS Total 62.80 1.08 65.14 0.93 0.261 63.79 1.15 63.65 0.8826 0.999 0.289
EIQ Ventursomeness 9.63 0.37 9.53 0.35 0.642 9.56 0.39 9.62 0.3316 0.945 0.664
EIQ Impulsivity 9.70 0.50 10.51 0.42 0.469 10.20 0.57 9.97 0.4013 0.741 0.347
SSS Disinhibition 5.40 0.27 5.86 0.25 0.583 5.81 0.32 5.52 0.2295 0.487 0.269
SSS Experience Seeking 5.44 0.21 5.36 0.20 0.360 5.71 0.25 5.25 0.1774 0.130 0.134
SSS Boredom Susceptibility 3.15 0.20 2.99 0.21 0.227 3.27 0.27 2.98 0.1754 0.314 0.193
SSS Thrill & Adventure Seeking 6.54 0.29 6.43 0.27 0.603 6.20 0.34 6.64 0.2495 0.346 0.514
SSS Total 20.63 0.66 20.51 0.63 0.323 20.77 0.74 20.48 0.5745 0.744 0.062
DDT* 0.06 .02–.21 0.04 .01–.15 0.006 0.08 .02–.19 0.04 .02–.14 0.183 0.006
  1. *untransformed DDT value with median and IQR given instead of Mean and SE, p values from log transformed values
  2. BIS = Barratt impulsivity Scale; EIQ = Eysenck Impulsivity Questionnaire; SSS = Sensation Seeking Scale; DDT = Delay Discounting Task.