. 2016 Feb 29;5:227. doi: 10.1186/s40064-016-1858-5

Table 3.

Pooled OR of the OGG1 Ser326Cys polymorphism based on different types of cancer

Type of cancer	No. of studies	Case/Control	Dominant model		Recessive model		Homozygous model
Type of cancer	No. of studies	Case/Control	OR (95 % CI)	P^a	OR (95 % CI)	P^a	OR (95 % CI)	P^a
Head and neck	6	1479/1589	1.3 (0.99–1.73)	<0.05*	1.37 (1.09–1.73)	0.007*	1.69 (1.06–2.68)	0.02*
Gastric	3	450/908	0.9 (0.71–1.14)	0.39	0.78 (0.47–1.29)	0.34	0.76 (0.45–1.27)	0.3
Colorectal	5	2479/3130	1.29 (0.9–1.84)	0.15	1.34 (1.05–1.71)	0.01*	1.38 (1.08–1.77)	0.009*

^aP heterogeneity

* Significant at P < 0.05