Details

Autor(en) / Beteiligte

• Sadeghnejad, Alireza

Titel

Effect of outdoor air pollution on hospital admissions for asthma in Detroit, Michigan

Ort / Verlag

ProQuest Dissertations & Theses

Erscheinungsjahr

2004

Quelle

ProQuest Dissertations & Theses A&I

Beschreibungen/Notizen

• We investigated the spatio-temporal relationship between number of asthma hospital admissions and levels of air pollutants ozone, particulate matter, nitrogen dioxide and sulfur dioxide. For the period 1999–2000, data were obtained on daily asthma hospital admissions for a contiguous region covering 23 zip codes in the East Seven Mile and Linwood areas of Detroit, Michigan. Each zip code falls within a 4-kilometer radius of an air quality monitoring station that provided detailed data on the air pollutants and meteorological assessments. Exposure to a pollutant was assessed based on its mean daily level in the 4-day period preceding a hospital admission. Linwood and East Seven Mile areas were predominantly African-American (about 66%). Mean daily admission rates per 100,000 for asthma were 1.4 in Linwood, and 1.1 in East Seven Mile. The month of September showed a very sharp increase in admissions. In a negative binomial model, we estimated an average of 8% increase in the number of daily asthma hospital admissions by 6 ppb increase in nitrogen oxide levels. We observed a significant protective effect for ozone. The levels of nitrogen dioxide and ozone were negatively correlated. Higher levels of nitrogen dioxide might increase asthma hospital admissions. Individual level data are needed to verify air pollutant effects on asthma.