Epidemiology of Depression, Alcohol, and Drug Abuse
Epidemiology is concerned with the study of the occurrence, course, and causes of health disorders in various populations. It is concerned both with absolute rates and comparative rates. These are expressed as prevalence, incidence, or disease expectancy (“Krankheitserwartung”). Prevalence and incidence are of administrative interest, while incidence and expectancy are of interest in comparing different populations at different periods of time.
KeywordsDepression Europe Dementia Schizophrenia
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