Table 3.

Stratified analysis of pancreatic cancer risk by adjusted covariates

Stratifying variables	Studies (n)	OR (95%CI)	Tests for heterogeneity
			χ2	P value	I2
Adjusted for smoking
Yes	4	1.32 (1.08-1.56)	4.14	0.246	27.60%
No	2	0.99 (0.68-1.30)	0.18	0.670	0.00%
Adjusted for drinking
Yes	3	1.51 (1.17-1.85)	1.70	0.428	0.00%
No	3	1.05 (0.83-1.28)	0.53	0.766	0.00%
Adjusted for diabetes
Yes	4	1.25 (0.95-1.55)	5.22	0.156	42.50%
No	2	1.24 (0.50-1.98)	1.54	0.214	35.20%