Table 1.

Genotype Distribution of 5-HTTLPR, OPRM1 A118G, and DRD2 −141C Ins/Del in Controls and Alcoholics

5-HTTLPR	n	S/S (%)	S/L (%)	L/L (%)
Controls	338	108 (32.0)	173 (51.2)	57 (16.9)
Alcoholics	365	136 (37.3)	163 (44.6)	66 (18.1)
MAXDRINKS ≤ 22	124	38 (30.6)	61 (49.2)	25 (20.2)
MAXDRINKS 23–35	121	46 (38.0)	56 (46.3)	19 (15.7)
MAXDRINKS ≥ 36	118	51 (43.2)	45 (38.1)	22 (18.6)
OPRM1 A118G	n	A/A (%)	A/G (%)	G/G (%)
Controls	338	198 (58.6)	120 (35.5)	20 (5.9)
Alcoholics	365	230 (63.0)	123 (33.7)	12 (3.3)
MAXDRINKS ≤ 22	124	70 (56.5)	48 (38.7)	6 (4.8)
MAXDRINKS 23–35	121	71 (58.7)	47 (38.8)	3 (2.5)
MAXDRINKS ≥ 36	118	88 (74.6)	27 (22.9)	3 (2.5)
DRD2 −141C Ins/Del	n	Ins/Ins (%)	Ins/Del (%)	Del/Del (%)
Controls	338	235 (69.5)	97 (28.7)	6 (1.8)
Alcoholics	365	270 (74.0)	84 (23.0)	11 (3.0)
MAXDRINKS ≤ 22	124	93 (75.0)	29 (23.4)	6 (1.8)
MAXDRINKS 23–35	121	82 (67.8)	36 (29.8)	2 (1.6)
MAXDRINKS ≥ 36	118	94 (79.7)	18 (15.3)	3 (2.5)