Methods for assessing the impact of PM<sub>2.5</sub> concentration on mortality while controlling for socio-economic factors.

Heliyon · 2022 · PMC9529546 · PMID 36203891

Europe PMC DOI

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an increasing trendno p-value reported

Interestingly, the PM 2.5 mean shows quite a concave shape, showing initially a decreasing and after an increasing trend.

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a negative trendno p-value reported

The second segment, where PM 2.5 is higher than 50 μg/m 3 , demonstrates that this relationship has a negative trend.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.