Real-world characterization and differentiation of the Global Initiative for Chronic Obstructive Lung Disease strategy classification.

Int J Chron Obstruct Pulmon Dis · 2014 · PMC4043424 · PMID 24920893

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borderline significanceno p-value reported

However, as this is a borderline significance, it should be viewed with caution, as geographic regions should not affect COPD characteristics.

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