Fiber and colorectal diseases: Separating fact from fiction

Table 2 Case-control studies correlating dietary fiber with colorectal neoplasia

Reference	Country	Number of cases/controls	Odds ratio of CRC comparing highest to lowest fiber intake groups	Dietary fiber protective
Wakai et al 2006[15]	Japan	507/2535	0.65 (P < 0.05)	Yes (colon)
Levi et al 2001[16]	Switzerland	286/550	0.55 (P < 0.05)	Yes
Ghadirian et al 1997[17]	Canada	402/668	0.50 (P < 0.01)	Yes
Slattery et al 1997[18]	United States	1993/2410	0.70 (95% CI 0.5-1.0)	No
Little et al 1993[19]	United Kingdom	147/329	0.60 (not significant after adjustment for energy intake)	No
Steinmetz et al 1993[20]	Australia	220/438	0.77 (not significant)	No

CRC: Colorectal cancer.