... whyWashington and other states should direct some part of their attention to the prevention of alcoholproblems in the elderly. These reasons include physiological changes among older persons that alter the ... levels of present use, and the more methodologically sophisticated the study, and the greater the reliability and validity of itsmeasures, the more accurate are the prevalence estimates. These ... ways by the study sites, the sources of the sample and sample selection methods, and the measures used to assessalcohol and other drug use.Until recently, information about the extent of the alcohol...