The Encyclopedia of Health and Aging presents state-of-the-art research and ready-to-use facts on health and aging. This one-volume resource captures some of the excitement of the research in the field in terms of new findings as well as conceptual developments guiding research, practice, and policy. With more than 200 entries, it covers the biological, psychological, social, and economic aspects of health and aging and impacts within the health-care system. This Encyclopedia also focuses heavily on geriatrics with respect to geriatric syndromes and common diseases of aging.