Abstract
In 2001, approximately 6.3 million American children under age 18 had asthma.1 According to data from the National Center for Health Statistics, the self-reported prevalence of pediatric asthma increased by an average of 4.3% per year between 1980 (36 per 1000 children) and 1996 (62 per 1000 children) (Figure), and the asthma death rate also increased during this period.2 The tendency of asthma to persist into adulthood appears to be strongly correlated with childhood severity. The Melbourne Epidemiological Study of Childhood Asthma, one of the most comprehensive, longitudinal studies of asthma patterns over time, showed that individuals with episodic asthma during childhood generally retained normal lung function as adults.
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