A1C predicts type 2 diabetes and impaired glucose tolerance in a population at risk: the community diabetes prevention project.

"Competing interests The authors declare that they have no competing interests."

"AcknowledgementsThe authors express sincere appreciation to Susan Adlis, LeAnn Anderson, Dawn Bina, Darla Friauf, Broatch Haig, Sue List, Mary Johnson, Pam McCabe, Joseph Nelson, Kate Peterson, Lee Ann Thomas, Paul Upham, Todd Weaver, Nancy Wicklin and Gloria Wood for their assistance in the design of the study, collection and preliminary analyses of the data, and to the volunteer dietetic students and their professors for their commitment and dedication to this study.This study was made possible by a research grant from the Park Nicollet Foundation. In addition, the authors acknowledge the ongoing support of Park Nicollet HealthSource, the Park Nicollet Health Research Committee and International Diabetes Center staff without whom this trial could not have been completed."