Patient characteristics.

<p>Categorical variables were summarized by frequency (%). Continuous variables were summarized by medians and interquartile ranges (IQR).</p>A<p>Summarized by frequency (%);</p>B<p>Summarized by median (IQR).</p><p><i>Abbreviations</i>:</p><p>FVC – functional vital capacity.</p><p>FEV1% – forced expiratory volume in one second percent predicted.</p><p>RV –residual volume.</p><p>TLC –total lung capacity.</p><p>DLco% – diffusing lung capacity of carbon monoxide percent.</p><p>Patient characteristics.