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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