In the time-varying Cox models, the HR of ischemic stroke associated with PM 2.5 reduced appreciably after adjusting for yearly mean temperature, and the temperature associations also attenuated to borderline significant trends after adjusting for PM 2.5 (Table S IV ).
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A cohort study evaluating the risk of stroke associated with long-term exposure to ambient fine particulate matter in Taiwan.
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The sentences
We found no association between most of the environmental exposures and risk of developing hemorrhagic stroke except positive associations with NO x and CO at a borderline significance level.