Airborne Particulate Matter Size and Chronic Obstructive Pulmonary Disease Exacerbations: A Prospective, Risk-Factor Analysis Comparing Global Initiative for Obstructive Lung Disease 3 and 4 Categories.

J Pers Med · 2023 · PMC10608161 · PMID 37888116

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closest p

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did not reach statistical significanceno p-value reported

Similarly, the utilization of oxygen supplementation at home was somewhat more prevalent in the GOLD 4 category (62.9%) compared to GOLD 3 (57.4%), yet this disparity did not reach statistical significance as indicated by a p -value of 0.621, as presented in Table 4 .

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highly significantno p-value reported

This variation was highly significant with a p -value of less than 0.001.

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