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PICO
Question: Among children less than 12 months of age, does exposure to air pollutants increase the risk of developing bronchiolitis?
Question type: Descriptive
Study design: Nested case-control study
Researchers from the University of Washington and University of British Columbia examined the association between infant bronchiolitis and ambient air pollution. Air pollution was measured by NO2/NO, SO2, CO, ozone, particulate matter (PM) with a diameter of 2.5 μm or less [PM2.5], PM10, black carbon, wood smoke, and proximity to highways and industrial emissions. All infants between 2 and 12 months of age with an inpatient or outpatient ICD-9 diagnosis of bronchiolitis were matched by …
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