Influences of polymorphic variants of DRD2 and SLC6A3 genes, and their combinations on smoking in Polish population

Table 1 DRD2 and SLC6A3 genotype distribution in ever smokers and never smokers from the North of Poland

Allele/Genotype	Total No. of alleles/subjects	%	Ever-smokers	%	Never-smokers	%
DRD2:
A1 ^†	118	19.2	47	15.7	71	22.5
A2	498	80.8	253	84.3	245	77.5
A2/A2	204	66.2	106	70.7	98	62.0
A1/A2	90	29.2	41	27.3	49	31.0
A1/A1	14	4.5	3	2.0	11	7.0
SLC6A3
*9	138	22.4	67	22.3	71	22.5
*10	474	76.9	230	76.7	244	77.2
*11	4	0.6	3	1.0	1	0.3
10/10	178	57.8	86	57.3	92	58.2
9/10	115	37.3	56	37.3	59	37.3
9/9	11	3.6	5	3.3	6	3.8
11/10	3	1.0	2	1.3	1	0.6
11/9	1	0.3	1	0.7	0	0

ISSN: 1471-2350