Table 2. With cut-off point of AHI of 5 as the diagnose of OSAHS disease.

Questionnaire	AUC (95% CI)	Sensitivity (95% CI)	Specificity (95% CI)	PPV (95% CI)	NPV (95% CI)
NoSAS	0.831 (0.768–0.894)	0.867 (0.815–0.919)	0.732 (0.537–0.785)	0.905 (0.859–0.951)	0.651 (0.833–0.769)
No-apnea	0.626 (0.539–0.714)	0.897 (0.851–0.943)	0.268 (0.152–0.384)	0.783 (0.724–0.842)	0.469 (0.296–0.642)
ESS	0.650 (0.568–0.775)	0.552 (0.476–0.627)	0.661 (0.351–0.613)	0.827 (0.759–0.898)	0.333 (0.246–0.421)
Berlin	0.698 (0.620–0.808)	0.758 (0.692–0.823)	0.482 (0.369–0.631)	0.812 (0.750–0.873)	0.403 (0.286–0.520)
STOP	0.735 (0.662–0.808)	0.830 (0.773–0.888)	0.500 (0.369–0.631)	0.830 (0.773–0.888)	0.500 (0.369–0.631)
STOP-Bang	0.730 (0.652–0.807)	0.903 (0.858–0.948)	0.268 (0.152–0.384)	0.784 (0.726–0.842)	0.484 (0.308–0.660)

AHI, apnea hypopnea index; OSAHS, obstructive sleep apnea-hypopnea syndrome; AUC, the area under the ROC curve; CI, confident interval; PPV, positive predictive value; NPV, negative predictive value; ESS, Epworth Sleepiness Scale; STOP, STOP questionnaire.