American Speech-Language-Hearing Association

Incidence and Prevalence

These fact sheets offer general population incidence and prevalence figures on speech, language, voice, and hearing disorders, as well as special populations that may be served by speech-language pathologists and/or audiologists.

Incidence and Prevalence

Special Populations


Healthy People 2010
A national initiative of the U.S. Department of Health and human services designed to improve the health of all by 2010. Find a technical assistance packet, description of ASHA's efforts and the role of speech-language pathologists, audiologists, and speech, language, and hearing scientists in the program.

Other Websites to Explore

Department of Health and Human Services
The Department of Health and Human Services is the United States government's principal agency for protecting the health of all Americans and providing essential human services, especially for those who are least able to help themselves. The Department includes more than 300 programs, covering a wide spectrum of activities. It is the largest grant-making agency in the federal government, providing some 60,000 grants per year. HHS' Medicare program is the nation's largest health insuror, handling more than 900 million claims per year.

The National Center for Health Statistics (NCHS)
The mission of NCHS is to provide statistical information that will guide actions and policies to improve the health of American people. As the Nation's principal health statistics agency, NCHS leads the way with accurate, relevant, and timely data.

The National Library of Medicine
The National Library of Medicine (NLM), one of three national libraries, is the world's largest research library in a single scientific and professional field. The Library has a statutory mandate from Congress to apply its resources broadly to the advancement of medical and health-related sciences. It collects, organizes, and makes available biomedical information to investigators, educators, and practitioners, and carries out programs designed to strengthen existing and develop new medical library services in the United States. It is the central resource for the existing national biomedical information system. 

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