title: Meat and meat-mutagen intake, doneness preference and the risk of colorectal polyps: the Tennessee Colorectal Polyp Study.
abstract: Although meat intake has been fairly consistently linked to the risk of colorectal cancer, only a few studies have evaluated meat intake by doneness level and the heterocyclic amines (HCAs) and polycyclic aromatic hydrocarbons (PAHs) produced by high temperature cooking of meat in relation to colorectal adenomatous and hyperplastic polyps. We evaluated these associations in a large colonoscopy-based case-control study. Included in this study were participants with adenomatous polyp only (n = 573), hyperplastic polyp only (n = 256), or both adenomatous and hyperplastic polyps (n = 199), and 1,544 polyp-free controls. In addition to information related to demographic and other lifestyle factors, meat intake by cooking method and doneness preference were obtained through telephone interviews. Polytomous logistic regression models were used to estimate odds ratios (OR) and 95% confidence intervals for the association between exposures and colorectal polyp risks. Presence of hyperplastic polyp was found to be positively associated with high consumption of total meat (p(trend) = 0.076) or red meat (p(trend) = 0.060), with an approximate 50-60% elevated risk observed in the highest vs. the lowest intake group. High intake of 2-amino-I-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) and 2-amino-3,4,8-trimethylimidazo [4,5]quinoxaline (DiMeIQx) were associated with increased risk for hyperplastic polyp (p(trend) = 0.036 and 0.038, respectively). With a possible exception of the intake of total well-done meats (p(trend) = 0.055) or well-done red meats (p(trend) = 0.074) with the risk of large adenomas, no other positive association was found specifically for the risk of adenomas with any of the exposure variables aforementioned. This study provides additional support for a positive association of high intake of red meat with colorectal adenomas, and suggests that high intake of meats and meat carcinogens may also be associated with hyperplastic polyps.
authors.affiliation: Vanderbilt Epidemiology Center, Vanderbilt University School of Medicine, Nashville, TN 37232-2587, USA.
authors.forename: Aesun
authors.initials: A
authors.lastname: Shin
authors.forename: Martha J
authors.initials: MJ
authors.lastname: Shrubsole
authors.forename: Reid M
authors.initials: RM
authors.lastname: Ness
authors.forename: Huiyun
authors.initials: H
authors.lastname: Wu
authors.forename: Rashmi
authors.initials: R
authors.lastname: Sinha
authors.forename: Walter E
authors.initials: WE
authors.lastname: Smalley
authors.forename: Yu
authors.initials: Y
authors.lastname: Shyr
authors.forename: Wei
authors.initials: W
authors.lastname: Zheng
mesh_terms: D018256:Adenomatous Polyps / Q000139:chemically induced / Q000453:epidemiology* / Q000473:pathology*; D000328:Adult; D000368:Aged; D003108:Colonic Diseases / Q000139:chemically induced / Q000453:epidemiology* / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D008460:Meat / Q000009:adverse effects*; D008875:Middle Aged; D009153:Mutagens / Q000494:pharmacology; D012002:Rectal Diseases / Q000139:chemically induced / Q000453:epidemiology* / Q000473:pathology*; D012307:Risk Factors; D012955:Societies, Medical; D013714:Tennessee / Q000453:epidemiology; D013997:Time Factors
chemical_list: D009153:Mutagens