STOP-Bang questions	Our analogous questions
Do you snore loudly (louder than talking or loud enough to be heard through closed doors)?	Do you snore?* OR Does your snoring cause your bed partner to sleep in another room?*
Do you often feel tired, fatigued, or sleepy during daytime?	From Epworth Sleepiness Scale: “How likely are you to doze off or fall asleep [when] sitting inactive in a public place (e.g. a theater or meeting), in contrast to feeling just tired?” Answer’s to question range on a scale of 0–3 which was coded to binary yes/no answer for the STOP-Bang as follows: 0 = would never doze (no) 1 = slight chance of dozing (no) 2 = moderate chance of dozing (yes) 3 = high chance of dozing (yes)
Has anyone observed you stop breathing during your sleep?	Has anyone ever told you that you stop breathing when you sleep?
Do you have or are you being treated for high blood pressure?	Do you, or have you ever, suffered from high blood pressure (hypertension)?
BMI more than 35 kg/m2?	Calculated from height and weight.
Age over 50 yr old?	Calculated from date of birth and questionnaire input date.
Neck circumference > 40cm.	Calculated from self reported neck size in inches.
Gender male?	What is your gender?

^*No difference was found when the analysis was repeated using either of these analogous questions.