Table 1. DRD4 VNTR Allele and Genotype Frequencies.

Allele/Genotype	n	%
Allele
2	70	8.30
3	31	3.67
4	547	64.81
5	11	1.30
7	172	20.38
8	13	1.54
Total	844	100
Genotype
2/2	2	0.47
2/3	1	0.24
2/4	47	11.14
2/7	17	4.03
2/8	1	0.24
3/3	1	0.24
3/4	17	4.03
3/7	10	2.37
3/8	1	0.24
4/4	175	41.47
4/5	7	1.66
4/7	117	27.73
4/8	9	2.13
5/7	4	0.94
7/7	11	2.60
7/8	2	0.47
Total	422	100
Genotype Classification
7-present	161	38.15
7-absent	261	61.85
Total	422	100