title: Dietary patterns and the risk of colorectal adenoma recurrence in a European intervention trial.
abstract: The relations between individual foods and nutrients to colorectal tumours are conflicting. Few studies have taken into account the interdependence between individual components of diet and their possible interactions. The aim of the study was to examine the associations between dietary patterns and the risk of colorectal adenoma recurrence in the European fibre-calcium intervention trial. Among the 640 patients with confirmed adenomas at the index colonoscopy, 592 had an initial dietary assessment using a diet history questionnaire. The present analysis was restricted to 277 men and 165 women without history of adenoma prior to the index colonoscopy and who completed the study. The main end point was the 3-year recurrence of adenomas. Principal component analysis was used to identify dietary patterns from 50 food groups. Ninety-two patients presented new colorectal adenomas at the 3-year colonoscopy (65 men and 27 women). In men, three meaningful dietary patterns emerged from analysis, explaining 21.3% of variability. They were called 'Mediterranean', 'Sweets and snacks' and 'High fat and proteins' patterns. None of them were significantly related to the overall recurrence of colorectal adenomas either in univariate or multivariate analyses. Among women, the 'Mediterranean', the 'Western' and the 'Snacks' patterns explained 21.9% of variability. The 'Mediterranean' pattern characterized by a high consumption of olive oil, vegetables, fruit, fish and lean meat significantly reduced adenoma recurrence [second tertile: adjusted odds ratio (OR)=0.50, 95% confidence interval (CI)=0.18-1.42; third tertile: adjusted OR=0.30, 95% CI=0.09-0.98; P for linear trend=0.04]. The 'Western' and 'Snacks' patterns were not associated with recurrence among women. In conclusion, this study suggests that the Mediterranean dietary pattern may reduce the recurrence of colorectal adenomas, at least in women. These exploratory results need to be confirmed by larger studies.
authors.affiliation: Registre Bourguignon des Cancers Digestifs (INSERM EPI 01-06), Faculté de Médecine de Dijon, BP 87900, 21079 Dijon, France.
authors.forename: V
authors.initials: V
authors.lastname: Cottet
authors.forename: C
authors.initials: C
authors.lastname: Bonithon-Kopp
authors.forename: O
authors.initials: O
authors.lastname: Kronborg
authors.forename: L
authors.initials: L
authors.lastname: Santos
authors.forename: R
authors.initials: R
authors.lastname: Andreatta
authors.forename: M-C
authors.initials: MC
authors.lastname: Boutron-Ruault
authors.forename: J
authors.initials: J
authors.lastname: Faivre
mesh_terms: D000236:Adenoma / Q000209:etiology* / Q000473:pathology*; D000368:Aged; D002136:Calcium, Dietary; D003113:Colonoscopy; D015179:Colorectal Neoplasms / Q000209:etiology* / Q000473:pathology*; D038441:Diet, Mediterranean; D004043:Dietary Fiber; D005060:Europe; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local; D016017:Odds Ratio; D012307:Risk Factors; D012737:Sex Factors
chemical_list: D002136:Calcium, Dietary; D004043:Dietary Fiber