Dietary change in an intervention trial of wheat bran fiber and colorectal adenoma recurrence.

Purpose: The objectives of this study were to determine whether participants in the Wheat Bran Fiber (WBF) trial exhibited changes in diet over time, and whether these changes were differential by assigned treatment group.

Methods: The WBF trial was a randomized trial with participants assigned to one of two groups: a low-fiber (2.0 g/d) or high-fiber (13.