Heart rate variability parameters in OSA patients and controls.

<p>Heart rate variability parameters in OSA patients and controls.</p

Demographic, clinical and electrophysiological data in OSA patients and controls.

<p>Demographic, clinical and electrophysiological data in OSA patients and controls.</p

Correlation between cardiac parasympathetic index and diagnostic PSG indices.

<p>(A) Linear association between ODI and log (P-Index), Pearson correlation test: r = 0.47, p = 0.0016; linear model: intercept = 7.32, p<0.001; slope = 9.81, p = 0.0016. (B) Linear association between AHI and log(P-Index), Pearson correlation test: r = 0.47, p = 0.0013; linear model: intercept = 8.60, p<0.001; slope = 11.34, p = 0.0013.</p

Performance of cardiac parasympathetic and sympathetic indexes and epworth sleepiness scale in differentiating OSA patients from controls.

<p>Performance of cardiac parasympathetic and sympathetic indexes and epworth sleepiness scale in differentiating OSA patients from controls.</p

Cardiac autonomic indexes.

<p>Upper limits of cardiac parasympathetic index (P-index, 1.15, light gray area) and cardiac sympathetic index (S-index, 1.08, light gray area) in OSA patients and controls (A and B respectively). The optimal cut-off levels were obtained as the points with the highest sum of sensitivity and specificity on ROC curves.</p