Clinical characteristics of patients newly diagnosed with COPD by the fixed ratio and lower limit of normal criteria: a cross-sectional analysis of the TargetCOPD trial.

Int J Chron Obstruct Pulmon Dis · 2018 · PMC6016600 · PMID 29950827

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did not reach statistical significanceno p-value reported

While this was also observed when comparing the LLN+/FR+ with the LLN−/FR+ group, this difference did not reach statistical significance.

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