Study population distribution by age and type of high school.

<p>Study population distribution by age and type of high school.</p

Reasons for consumption.

<p>*p<0,05 statistically significant frequency difference between males and females.</p><p>**Multiple choice is allowed.</p

Benefic effects and willingness to continue assumption.

<p>*p<0,05 statistically significant frequency difference between males and females.</p

Distribution of the study population on the basis of the number of types of consumed dietary supplements.

<p>*p<0,05 statistically significant difference between males and females.</p

Distribution of the study population on the basis of the consumption of single dietary supplement type by category.

<p>Distribution of the study population on the basis of the consumption of single dietary supplement type by category.</p

Knowledge of dietary supplements and awareness of perceived indications for their use.

<p>*p<0,05 statistically significant difference between males and females.</p><p>N.B.: Multiple choice was allowed.</p

Percentage of patients with metabolic syndrome (MetS) according to sleep disordered breathing.

<p>Percentage of patients with metabolic syndrome (MetS) according to sleep disordered breathing.</p

Baseline Characteristics of the Study Population, according to the severity of sleep disordered breathing.

<p>Values represent mean±standard deviation unless otherwise indicated.</p><p>#Number of patients with MetS. Percentage values in parentheses.</p>a<p>p<0.05 vs. no OSA.</p>b<p>p<0.01 vs no OSA.</p>c<p>p<0.001 vs no OSA.</p