Associations Between Ambient PM sub(2.5) Concentrations and Respiratory Symptoms in Melbourne, 1998-2005

Associations between ambient PM sub(2.5) concentrations and respiratory symptoms in Melbourne were studied. Baseline and follow-up symptom measurements were included and a random effect for subject was included in the model to account for excess correlation in symptoms measured repeatedly from the s...

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Bibliographic Details
Published in:Journal of toxicology and environmental health. Part A 2007-01, Vol.70 (19), p.1613-1613
Main Authors: Bennett, Charmian M, Simpson, Pamela, Raven, Joan, Skoric, Billy, Powell, Jennifer, Wolfe, Rory, Walters, EHaydn
Format: Article
Language:English
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Summary:Associations between ambient PM sub(2.5) concentrations and respiratory symptoms in Melbourne were studied. Baseline and follow-up symptom measurements were included and a random effect for subject was included in the model to account for excess correlation in symptoms measured repeatedly from the same subject. It was indicated that the associations between ambient PM sub(2.5) and adverse respiratory symptoms were non significant, although small to moderate effects could not be ruled out. The protective cross-sectional associations were found with ambient PM sub(2.5) and both cough in the morning and cough with phlegm in the morning. The results were contradictory to longitudinal associations and might be chance findings or an artifact of the limited variability in exposure levels.
ISSN:1528-7394
DOI:10.1080/15287390701434695