Table 3 DRD4 VNTR allele frequencies, genotypes and genotype classifications

Allele

2

39

10.1

3

15

3.9

4

265

68.7

5

1

0.3

7

64

16.6

9

2

0.5

Total

386

100.0

Genotype

2/2

3

1.6

2/3

1

0.5

2/4

30

15.5

2/7

2

1.0

3/3

1

0.5

3/4

10

5.2

3/7

2

1.0

4/4

85

44.0

4/5

1

0.5

4/7

52

26.9

4/9

2

1.0

7/7

4

2.1

Total

193

100.0

Genotype Classification*

L-

131

67.9

L+

62

32.1

Total

193

100.0