This remains an excellent textbook for students learning to evaluate the literature or design their own studies. New chapters on physical activity, genetics, and policy provide much needed updates on the methods used by today's researchers. ? Doody's Notes, Jan 2013 Reviews from the previous editionVery valuable reading for anyone considering undertaking a dietary survey. For those attempting to measure dietary intakes in an epidemiologic context, Willett's book will be essential reading. ? American Journal of EpidemiologyVery valuable to the growing group of researchers and graduate students wanting to understand the relationship between diet and the incidence of chronic disease among adult Americans... The volume as a whole makes a valuable contribution, since it is comprehensive and summarizes significant developments from the last ten years; a compilation of information about nutrition epidemiology has long been lacking. ? Journal of Nutrition EducationIt is a clear, coherent, and eminently readable expose of a very complex, multifaceted new discipline. ? Community Health StudiesThis outstanding book is essential reading for graduate students and researchers in the field. It is also a useful resource for any nutritional scientists, epidemiologists, and health professionals who use results of epidemiological studies to make policies that promote healthy eating. ? Julie A. Mares, PhD, Professor of Nutrition, Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health Biografía del autor Walter Willett, MD, DrPH, is the Stare Professor of Epidemiology and Nutrition and Chair of the Department of Nutrition at the Harvard School of Public Health.