Table 4. Percentages and Chi-Square Statistic of Serotonin System Genotypes according to CU Group.

Gene	SNP	Low CU (N = 92)			High CU (N = 41)			χ2
		Minor Homozygote	Heterozygote	Major Homozygote	Minor Homozygote	Heterozygote	Major Homozygote	(N = 133)
HTR1A	rs6295	26	54	20	34	39	27	2.49
HTR1B	rs13212041	46		54	43		57	0.11
	rs6296	11	31	58	5	49	46	4.08
	rs130058	11	37	52	5	56	39	4.57
	rs11568817	22	37	41	7	68	24	11.63* #
HTR2A	rs6314	29		71	7		93	7.88* #
	rs6311	20	45	35	20	34	46	1.54
HTR3B	rs1176744	15	39	46	18	37	45	0.18
TPH1	rs1800532	12	38	50	20	44	37	2.49
	rs211105	6	47	47	10	37	53	1.18
TPH2	rs4570625	40		60	40		60	0.00
	rs11178997	10		90	15		85	0.72
	rs7305115	21	42	37	15	56	29	2.17
	rs4565946	19	52	29	13	52	35	0.64
SLC6A4	rs2066713	25	35	40	22	46	32	1.64

Note:

^*represents p<0.01 (2-tailed),

^#represents p<0.05 after FDR adjustment for 15 comparisons. SNPs located on the same chromosome are listed in order of their position along the gene.