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Table 2 Distribution of alleles 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
Alleles Patients Controls Total Patients Controls Total Patients Controls Total
A1 123(0.219) 51(0.176) 174(0.204) 101(0.244) 32(0.163) 133(0.218) 22(0.149) 19(0.202) 41(0.169)
A2 439(0.781) 239(0.824) 678(0.796) 313(0.756) 164(0.837) 477(0.782) 126(0.851) 75(0.798) 201(0.831)
Total 562 290 852 414 196 610 148 94 242
  1. a Normalised frequencies are given in brackets
  2. b χ2 = 2.18, df = 1, P = 0.140
  3. c χ2 = 5.08, df = 1, P = 0.024
  4. d χ2 = 1.17, df = 1, P = 0.280