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Original Article
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Volume 331:1542-1546 December 8, 1994 Number 23
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Patterns of Asthma Mortality in Philadelphia from 1969 to 1991
David M. Lang, and Marcia Polansky

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ABSTRACT

Background The rate of mortality from asthma has increased substantially in the United States since 1978. We analyzed the patterns of the rates of death from asthma in Philadelphia between 1969 and 1991.

Methods The rates of death from asthma were analyzed and compared with trends in the concentrations of major air pollutants: ozone, carbon monoxide, nitrogen dioxide, particulate matter (particles <10 microm in diameter), and sulfur dioxide. Univariate and multivariate analyses were used to study the rates of death from asthma from 1985 to 1991 and their association with race, poverty, sex, and other factors.

Results The rate of death from asthma decreased from 1.68 per 100,000 people in 1969 to 0.68 per 100,000 in 1977, but then increased to 0.92 per 100,000 in 1978 and 2.41 per 100,000 in 1991. Between 1965 and 1990, the concentrations of major air pollutants declined substantially. From 1985 to 1991, 258 people were identified for whom asthma was the primary cause of death. According to multivariate analysis, the rates of death from asthma from 1985 to 1991 were significantly higher in census tracts with higher percentages of blacks (P = 0.032), Hispanics (P = 0.013), female residents (P<0.001), and people with incomes in the poverty range (P<0.001).

Conclusions The rates of death from asthma have increased in Philadelphia, whereas concentrations of major air pollutants have declined. The rates are highest in census tracts with the highest percentages of poor people and minority residents, particularly blacks. Public health efforts should target urban areas where the risk of death from asthma is highest.


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From the Department of Medicine, Division of Allergy and Immunology (D.M.L.), and the Department of Humanities, Social Sciences, and Biometrics (M.P.), Hahnemann University Hospital, Philadelphia. Presented in part at the annual meeting of the American Academy of Allergy and Immunology, Chicago, March 16, 1993.

Address reprint requests to Dr. Lang at Hahnemann University, Mail Stop 107, Division of Allergy and Immunology, Broad and Vine Sts., Philadelphia, PA 19102-1192.

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