Click http://www.cdc.gov/nchs/about/major/nhis/released200409.htm#15 for an Early Release of Selected Estimates Based on Data From the January-March 2004 National Health Interview Survey. Go to Part #16, which deals with asthma. It contains the following information: Percent of persons of all ages who experienced an asthma episode in the past 12 months: United States, 1997-2004; Percent of persons of all ages who experienced an asthma episode in the past 12 months, by age group and sex: United States, January-March 2004; Sex-adjusted percent of persons of all ages who experienced an asthma episode in the past 12 months, by age group and race/ethnicity: United States, January-March 2004; Prevalence of current asthma among persons of all ages: United States, 2001-2004; Prevalence of current asthma among persons of all ages, by age group and sex: United States, January-March 2004; Sex-adjusted prevalence of current asthma among persons of all ages, by age group and race/ethnicity: United States, January-March 2004.
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