Table 4.

The relationship between smoking status and genetic polymorphisms in ERCC1

Groups	Smoking		OR (95% CI)	No smoking		OR (95% CI)
	Cases	Controls		Cases	Controls
ERCC1 rs3212986
CC	40	54	1.000	55	60	1.000
CA	28	22	1.718 (0.860‐3.433)	45	38	1.292 (0.734‐2.276)
AA	13	5	3.510 (1.157‐10.645)[Link]	5	7	0.779 (0.234‐2.599)
CA + AA	41	27	2.050 (1.086‐3.868)[Link]	50	45	1.212 (0.703‐2.089)

χ² = 5.335, P = 0.021.

χ² = 4.967, P = 0.026.