Environmental tobacco smoke and asthma in Philadelphia neighborhoods
A study of the relationship between passive tobacco smoke and asthma.
Using Geographical Information System (GIS) software, we superimposed the addesses of people with self reported asthma with addresses of those who self reported smoking. Data was taken from a large survey of the incidence of various diseases in Philadelphia. There was a large degree of overlap. Also, asthma seemed to be more prevalent in the most crowded inner-city areas.
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