The effect of strict adherence to a high-fiber, high-fruit and -vegetable, and low-fat eating pattern on adenoma recurrence.
Individual differences in dietary intake are thought to account for substantial variation in cancer incidence. However, there has been a consistent lack of effect for low-fat, high-fiber dietary interventions and risk of colorectal cancer. These inconsistencies may reflect the multistage process of cancer as well as the range and timing of dietary change. Another potential reason for the lack of effect is poor dietary adherence among participants in these trials. The authors examined the effect of strict adherence to a low-fat, high-fiber, high-fruit and -vegetable intervention over 4 years among participants (n = 1,905) in the US Polyp Prevention Trial (1991-1998) on colorectal adenoma recurrence. There was a wide range of individual variation in the level of compliance among intervention participants. The most adherent participants, defined as "super compliers" (n = 210), consistently reported that they met or exceeded each of the 3 dietary goals at all 4 annual visits. Multivariate logistic regression models were used to estimate the association between dietary adherence and adenoma recurrence. The authors observed a 35% reduced odds of adenoma recurrence among super compliers compared with controls (odds ratio = 0.65, 95% confidence interval: 0.47, 0.92). Findings suggest that high compliance with a low-fat, high-fiber diet is associated with reduced risk of adenoma recurrence.
Sansbury
Leah B
LB
Division of Cancer Control and Population Sciences, 6130 Executive Boulevard, Room 5106, Mail Stop Code 7324, Bethesda, MD 20892, USA. sansburl@mail.nih.gov
Wanke
Kay
K
Albert
Paul S
PS
Kahle
Lisa
L
Schatzkin
Arthur
A
Lanza
Elaine
E
D000236:Adenoma / Q000178:diet therapy* / Q000473:pathology / Q000523:psychology; D000368:Aged; D015331:Cohort Studies; D003110:Colonic Neoplasms / Q000178:diet therapy* / Q000473:pathology / Q000523:psychology; D003113:Colonoscopy; D018752:Diet, Fat-Restricted; D004043:Dietary Fiber / Q000008:administration & dosage*; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000473:pathology / Q000517:prevention & control*; D010349:Patient Compliance; D012189:Retrospective Studies