Epidemiology is the study of diseases in populations. Epidemiology is a health field, but unlike more traditional or well-known professions such as nursing this profession is concerned with the overall health of populations, not working with individual patients. Epidemiology is a quantitative field that describes specific populations via numerical means. After providing an overview of the field of epidemiology, this entry discusses disability epidemiology and research on incidence and prevalence of specific communication disorders. The entry concludes with a look at the World Health Organization’s International Classification of Functioning, Disability, and Health (ICF).

Overview of the Field of Epidemiology

One of two major types of epidemiology is descriptive epidemiology. This branch looks at prevalence (how many total people have the disease) and incidence (how many new people ...

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