American Journal of Epidemiology Vol. 108, No. 3: 200-206
Copyright © 1978 by The Johns Hopkins University School of Hygiene and Public Health
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ASSESSMENT OF SURVEILLANCE AND VITAL STATISTICS DATA FOR MONITORING ABORTION MORTALITY, UNITED STATES, 19721975
Family Planning Evaluation Division, Bureau of Epidemiology, Center for Disease Control Atlanta, GA 30333, and the National Center for Health Statistics, Hyattsville, MD 20782
Send reprint requests to Dr. Willard Cates, Jr.Abortion Surveillance Branch, Family Planning Evaluation Division, Center for Disease Control, Atlanta,GA 30333
To assess the usefulness of vital statistics and surveillance for monitoring abortion mortality, the authors compared data from two systems of classification: 1) deaths classified according to the underlying cause by the National Center for Health Statistics (NCHS) under the International Classification of Disease, Adapted (ICDA) code numbers 640645 (abortion) for 19721975; and 2) abortion-related deaths reported to the Center for Disease Control (CDC) through Its epidemiologic surveillance of abortion mortality for the same years. Vital statistics classifications dealing with the underlying cause of death are based on criteria defined by ICDA guidelines applied to all available Information listed on death certificates, and exclude some deaths classified as abortion-related by CDC. Surveillance classifications are based on broader criteria developed by CDC from expanded data gathered by individual case investigation. Results showed that the surveillance techniques had Identified more deaths as abortion-related and had resolved more cases Into the specific abortion categories of legal, Illegal, and spontaneous than vital statistics tabulations based on death certificates. The authors estimate that the surveillance system alone reported 88% of all abortion-related deaths, the vital statistics system 52%, and the two systems combined a total of 94%. Inadequate physician documentation on the death certificate was the primary reason vital statistics data contained a smaller number of reported abortion deaths than surveillance data.
abortion; mortality; surveillance; vital statistics
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