Table 4.

Analysis of genes allele in ESCC progression

Gene	Locus	Control allele frequency (n = 92)		Case allele frequency (n = 36)		OR (95% CI)	P value
		1	2	1	2
CYP2A6	Rs8192720	153	31	68	4	0.290 (0.099-0.855)	0.018
MGMT	Rs7068306	137	47	41	31	2.204 (1.244-3.906)	0.006
MGMT	Rs10734088	135	49	42	30	1.968 (1.111-3.484)	0.019
MGMT	Rs4751115	112	72	30	42	2.178 (1.251-3.791)	0.005
MGMT	Rs2053139	93	91	48	24	0.511 (0.289-0.903)	0.020