OBJECTIVE: To verify the reliability of a STOP-Bang questionnaire and objective blood oxygen concentration (SpO METHODS: STOP-Bang score and pulse oximetry value (SpO RESULTS: With sensitivity and specificity scores of 91.2% and 88.6%, respectively, positive predictive value 90.5%, negative predictive value 40.2%, the twin diagnostic test (STOP-Bang and pulse oximetry) was found to be highly congruent with the polysomnography (PSG), achieving a diagnostic accuracy of 85%. CONCLUSION: Dental chairside screening by STOP-Bang questionnaire and pulse oximetry would be a good option, especially where logistic and economic constraints impede all-night polysomnography.