Description of the data source, numerator, denominator, survey questions, and other relevant details about the national estimate.
Otitis media, commonly called ear infection, is an inflammation of the middle ear caused by viral or bacterial infection.
The number of otitis media visits to ambulatory care facilities obtained from the National Ambulatory Medical Care Survey (NAMCS) are added to the number of visits obtained from the National Hospital Ambulatory Care Survey (NHAMCS).
Ambulatory care facilities include physicians' offices, hospital emergency departments and outpatient departments.
FOR SINGLE DATA YEARS: Ambulatory care visit rates are calculated using the July 1 estimates of the civilian noninstitutionalized population from the Vintage matching the data year for the postcensal period based on the 2000 census. For example, July 1, 2007 civilian noninstitutionalized population estimates from Vintage 2007 are used as the denominator for 2007 rates. Rates for 2010 are also calculated using the July 1 estimates based on the 2000 census.
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