Table 1.

Risk factors for gallbladder cancer (adapted with permission from [23])

Risk factor	Relative risk	Reference
Gallstones	3.01-23.8	[28-31]
Size of gallstones (cm)
2.0-2.9	2.4	[32,34]
> 3.0	9.2-10.1
Duration of gallstones (years)
5-19	4.9	[37]
> 20	6.2
Body mass index	Males Females
30.0-34.9	1.8 2.1	[71]
Infections
Chronic typhoid and paratyphoid carriers	12.7-167	[51, 52]
Helicobacter bilis	2.6-6.5	[48, 50]