Is diabetes mellitus a risk factor for pancreatic cancer?

Table 1 Diabetes as a risk factor for pancreatic cancer according to diabetes duration

Meta-analysis	Studies evaluated (n)		Diabetes duration (yr)	Risk	95%CI
Everhart et al[76]	20	All studies evaluated	> 1	RR = 2.1	1.6-2.8
	11	All case-control studies	> 1	RR = 1.8	1.1-2.7
	9	All cohort studies	> 1	RR = 2.6	1.6-4.1
	11	All studies	> 5	RR = 2.0	1.2-3.2
	6	All case-control studies	> 5	RR = 1.8	0.86-3.8
	6	All cohort studies	> 5	RR = 2.4	0.85-7.0
Li et al[64]	3		≤ 2	OR = 2.9	2.1-3.9
	3		3-5	OR = 1.9	1.3-2.6
	3		6-10	OR = 1.6	1.2-2.3
			11-15	OR = 1.3	0.9.2.0
			> 15	OR = 1.4	1.0-2.0
Huxley et al[80]	9		1-4	RR = 2.05	1.87-2.25
	9		5-9	RR = 1.54	1.31-1.81
	7		≥ 10	RR = 1.51	1.16-1.96
Ben et al[84]	3		< 1	RR = 5.38	3.49-8.30
	5		1-4	RR = 1.95	1.65-2.31
	4		5-9	RR = 1.49	1.05-2.12
	4		≥ 10	RR = 1.47	0.94-2.31