Table 3.

Summary of different comparative results

Variables	N	Cases/Controls	DD+DI vs II		DD vs DI+II		DD vs II		D vs I		DI vs II
			OR(95%CI)	P*	OR(95%CI)	P*	OR(95%CI)	P*	OR(95%CI)	P*	OR(95%CI)	P*
Total	25	3914/11391	0.88(0.73, 1.06)	0.38	0.93(0.80, 1.09)	0.39	0.90(0.73, 1.12)	0.34	0.94(0.83, 1.07)	0.34	0.89(0.75, 1.06)	0.20
Subgroup by ethnicity
Asian	8	1201/1950	1.13(0.96, 1.33)	0.15	1.05(0.74, 1.49)	0.78	1.09(0.83, 1.44)	0.53	1.08(0.93, 1.25)	0.34	0.85(0.68, 1.06)	0.14
European	14	2188/8130	0.89(0.73, 1.09)	0.26	0.89(0.73, 1.09)	0.26	0.76(0.53, 1.08)	0.12	0.86(0.71, 1.03)	0.10	0.78(0.60, 1.01)	0.06
Subgroup by cancer type
Lung	7	737/6511	1.04(0.70, 1.55)	0.85	0.99(0.67, 1.48)	0.98	1.02(0.62, 1.69)	0.93	1.03(0.80, 1.31)	0.83	1.01(0.64, 1.61)	0.95
Breast	5	1235/8057	0.88(0.71, 1.09)	0.24	0.95(0.75, 1.21)	0.70	0.86(0.64, 1.16)	0.33	0.94(0.81, 1.09)	0.41	0.88(0.72, 1.09)	0.24
Colorectal	4	517/6456	0.81(0.53, 1.24)	0.34	0.83(0.66, 1.05)	0.11	0.73(0.45, 1.18)	0.20	0.87(0.71, 1.06)	0.17	0.87(0.58, 1.31)	0.50
Gastric	3	434/775	1.06(0.71, 1.59)	0.78	0.94(0.66, 1.36)	0.76	0.96(0.55, 1.65)	0.87	1.00(0.74, 1.34)	1.00	1.12(0.79, 1.58)	0.52
Prostate	3	276/6094	2.44(0.66, 8.97)	0.18	2.05(0.74, 5.62)	0.17	3.48(0.63, 19.13)	0.15	2.05(0.84, 5.02)	0.11	1.66(0.67, 4.07)	0.27

*: P value for Q-test.