| | CHEST: Asthma Hospitalizations and Mortality in Chicago - .Statistical Data Included - ) (Site not responding. Last check: 2007-10-20) |
 | | Hospitalization data for the United States were obtained from published reports from the National Hospital Discharge Survey,[4] which is administered by the National Center for Health Statistics in Hyattsville, MD. The National Hospital Discharge Survey is a multistage probability survey of hospital discharges from short-stay, acute-care hospitals in the United States. |
 | | Mortality data for the United States from 1990 to 1995 were obtained from published reports from the Centers for Disease Control and Prevention.[5] The Centers for Disease Control and Prevention obtains mortality data from the underlying cause-of-death data set, which is part of the national vital records system. |
 | | Age is not supplied in the hospital data set, so age for hospitalizations was defined to be age at discharge, and was calculated by subtracting the date of birth from the discharge date. |
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