All these mentioned sub-group analyses for NO 2 and PM 2.5 suggest that applying more precise exposure assessment methods tends to yield higher exposure effect values, though with slight significance.
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Key factors in epidemiological exposure and insights for environmental management: Evidence from meta-analysis.
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The sentences
Increasing subject granularity to individual exposure level showed a slightly significant impact on effect estimation (with a p-value approaching the 0.1 level).