Definitions and Basic Concepts
New approaches that must be evaluated by using standard methods Romaguera, German, and Klaucke include the following:. Surveillance also clearly leads to a cost saving if it prevents the need for expenditure on treating patients. Theory to Practice, ed. Before , the surveys included persons through 74 years of age; after , there was no upper age limit. Currently, more than two thirds of US adults and approximately one third of US children and adolescents are overweight or obese, and some minority and low-SES groups are disproportionally affected. In general, states in the southeastern United States have higher prevalence rates than states on the West Coast, in the Midwest, and on the northeast coast. Errors and bias can make their way into a surveillance system at any stage.
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