Baseline clinical and echocardiographic characteristics of study population.

*<p>Categorical values are presented as number (percentage); continuous variables as mean ± standard deviation.</p>†<p>Echocardiographic data was available in 233 patients.</p><p>COPD = chronic obstructive pulmonary disease; LV = left ventricular; RLS = restless legs syndrome.</p

Polysomnographic variables of study population.

*<p>Categorical values are presented as number (percentage); continuous variables as mean ± standard deviation.</p><p>AHI = apnea-hypopnea index; REM = rapid eye movement; TST = total sleep time.</p

Univariate and multivariate predictors of atrial fibrillation progression.

<p>CI = confidence interval; OR = odds ratio.</p