Several epidemiologic studies have reported associations between respiratory disease and particulate matter less than 2.5 pm in diameter (PM2.5) or fine particles.
However, since daily fine particulate data from ambient monitors are seldom available, many studies have used estimates of PM2.5 based on visual range observed at local airports.
This paper examines the impact of visibility-based estimates of PM2.5 on mortality from 1980 through 1986 in San Bernardino and Riverside Counties, located in the Los Angeles metropolitan area.
Multiple regression analysis was used to isolate the effects of estimated fine particles on mortality while controlling for covariates, including season, day of week, maximum temperature, and dew point.
The results are dependent on season.
During the summer quarters, there was a small but statistically significant association of estimated fine particles with both total mortality (RR=1.03,95% CI=1.00-1.05, evaluated at the mean PM2.5 value of 32.5 mug/m3) and respiratory-specific mortality.
However, for the year taken as a whole, estimated fine particles were not associated with mortality (RR=1.00 ; 95% CI=0.99-1.02).
The use of estimated fine particles introduces additional measurement error into the analysis.
During the summer quarters, an effect of ozone on mortality was also detected, but this association could be due to confounding with temperature. (...)
Mots-clés Pascal : Pollution air, Particule en suspension, Dimension particule, Toxicité, Homme, Epidémiologie, Californie, Etats Unis, Amérique du Nord, Amérique, Mortalité, Milieu urbain, Variation saisonnière, Visibilité, Elément météorologique
Mots-clés Pascal anglais : Air pollution, Suspended particle, Particle size, Toxicity, Human, Epidemiology, California, United States, North America, America, Mortality, Urban environment, Seasonal variation, Visibility, Meteorological variable
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0340458
Code Inist : 002B03M02. Création : 10/04/1997.