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Ozone-related respiratory morbidity in a low-pollution region
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Jul 2017
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Source: J Occup Environ Med. 59(7):624-630.
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Alternative Title:J Occup Environ Med
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Description:Objective
We evaluated the effects of ozone on respiratory-related hospital admissions in three counties in Washington State from 1990 – 2006. We further examined vulnerability to ozone by key demographic factors.
Method
Using linked hospital admission and ambient monitoring data, we estimated the age-, sex-, and health insurance-stratified associations between ozone (0-3 days’ lag) and respiratory-related hospital admissions in King, Spokane, and Clark County, Washington.
Results
The adjusted relative risk (RR) for a 10 ppb increase in ozone at 3 days’ lag was 1.04 (95% confidence interval [CI]: 1.02, 1.07) for Clark County, 1.03 (95% CI: 1.01, 1.05) for Spokane County, and 1.02 (95% CI: 1.01, 1.03) for King County. There was consistent evidence of effect modification by age.
Conclusion
Ozone at levels below federal standards contributes to respiratory morbidity among high-risk groups in Washington.
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Pubmed ID:28594702
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Pubmed Central ID:PMC5503782
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