Epidemiology and economic aspects
نویسندگان
چکیده
Descriptive epidemiology The measures employed are incidence and prevalence. A first step in descriptive epidemiology is to obtain a valid definition of what constitutes a “case.” Quite surprisingly, up to now, no widely employed diagnostic criteria have been developed for clinical and population based studies of psoriasis. The first diagnosis made by a physician and the first appearance of skin lesions as reported by the patient have both been taken as markers of “onset” in epidemiologic studies.
منابع مشابه
Observations on the Incidence, Epidemiology, Control and Economic Importance of Gastro-Intestinal Parasites of Sheep and Goats in Iran
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