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Table 3 Distribution of genotypes of DRD2 Taq I A polymorphism in heroin-dependent patients and control individualsa

From: Allelic and genotypic associations of DRD2 Taq I A polymorphism with heroin dependence in Spanish subjects: a case control study

  Allb Malesc Femalesd
Genotypes Patients Controls Total Patients Controls Total Patients Controls Total
A1-A1 20(0.071) 2(0.014) 22(0.052) 17(0.082) 0 17(0.056) 3(0.041) 2(0.043) 5(0.041)
A1-A2 83(0.295) 47(0.324) 130(0.305) 67(0.324) 32(0.327) 99(0.325) 16(0.216) 15(0.319) 31(0.256)
A2-A2 178(0.633) 96(0.662) 274(0.643) 123(0.594) 66(0.673) 189(0.620) 55(0.743) 30(0.638) 85(0.702)
Total 281 145 426 207 98 305 74 47 121
  1. a Normalised frequencies are given in brackets
  2. b χ2 = 6.48, df = 2, P = 0.039
  3. c χ2 = 8.72, df = 2, P = 0.013
  4. d χ2 = 1.64, df = 2, P = 0.440