Meta analysis of risk factors for colorectal cancer

Table 2 Results from meta-analysis of risk factors of colorectal cancer

Factors	Number of references	Pooled OR and 95%CI	Factors	Number of references	Pooled OR and 95%CI
(1) History of chronic diarrhea	7	4.80 (4.30-5.37)	(8) Pickled vegetables	3	1.86 (1.67-2.07)
(2) History of fecal mucohemorrhage	5	7.18 (5.06-10.21)	(9) High lipid food	3	3.16 (2.22-4.51)
(3) History of bowel polyps	5	12.69 (7.49-21.48)	(10) Proper physical activities	4	0.74 (0.72-0.77)
(4) History of constipation	4	2.23 (1.95-2.54)	(11) Alcohol drinking	5	1.06 (0.91-1.24)
(5) History of appendicitis	3	1.98 (1.71-2.28)	(12) Cigarette smoking	5	1.40 (1.10-1.77)
(6) Dietary fibers	5	0.79 (0.59-0.99)	(13) Emotional trauma	4	2.95 (2.81-3.09)
(7) Fish fry-cooked with soybean sauce	4	2.99 (2.69-3.35)	(14) Family history of cancers	7	2.27 (2.12-2.44)
(1) references: 1, 2, 5, 7, 9, 13, 14		(2) references: 1, 5, 7, 9, 13		(3) references: 1, 2, 5, 7, 12
(4) references: 1, 5, 7, 9		(5) references: 1, 2, 5		(6) references: 4, 6, 10, 11, 14
(7) references: 1, 5, 6, 7		(8) references: 2, 6, 14		(9) references: 4, 5, 14
(10) references: 4, 10, 13, 14		(11) references: 2, 5, 8, 13, 14		(12) references: 2, 5, 6, 8, 14
(13) references: 1, 4, 5, 7		(14) references: 1, 3, 4, 5, 6, 7, 14