Table 2: STOP-Bang questionnaire.

1 Snoring Do you snore loudly (louder than talking or loud enough to be heard through closed doors)? yes no
2 Tired Do you often feel tired, fatigued, or sleepy during daytime? yes no
3 Observed Has anyone observed you stop breathing during your sleep? yes no
4 Blood pressure Do you have or are you being treated for high blood pressure? yes no
5 BMI BMI more than 35 kg/m2? yes no
6 Age Age over 50 yr old? yes no
7 Neck circumference Neck circumference greater than 40 cm? yes no
8 Gender Gender male? yes no

High risk of OSA: answering yes to three or more items.

Low risk of OSA: answering yes to less than three items.