A significant trend of linear relationship between the quartiles of FIFmax changes and exacerbation rates was observed (p-value for trend <0.001).
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Maximal Forced Inspiratory Flow Dynamics and Acute Exacerbation in Chronic Obstructive Pulmonary Disease Patients with Exacerbation History.
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The sentences
The proportion of males was slightly higher in Q4 than Q2 at 95.6% to 77.8%, though this difference did not reach statistical significance.