Table 1: Screening Questionnaires for Obstructive Sleep Apnoea.

Questionnaire
Epworth Sleepiness Scale[13]	Berlin Questionnaire[14]	STOP-BANG Questionnaire[15]
Questions
How likely are you to doze off or fall asleep in the following situations? For each situation, assign ‘chance of dozing’ from 0 to 3: 0 = none; 1 = slight chance; 2 = moderate chance; 3 = high chance 1. Sitting and reading 2. Watching TV 3. Sitting, inactive in a public place 4. As a passenger in a car for an hour without a break 5. Lying down to rest in the afternoon when circumstances permit 6. Sitting and talking to someone 7. Sitting quietly after lunch without alcohol 8. In a car, while stopped for a few minutes in traffic	Category 1 1. Do you snore? If yes: 2. Your snoring is: a. Slightly louder than breathing b. As loud as talking c. Louder than talking d. Very loud (can be heard outside of room) 3. How often do you snore? a. Nearly every day b. 3–4 times a week c. 1–2 times a week d. 1–2 times a month e. Rarely or never 4. Has your snoring ever bothered people? 5. Has anyone noticed that you stop breathing during sleep? a. Nearly every day b. 3–4 times a week c. 1–2 times a week d. 1–2 times a month e. Rarely or never Category 2 6. How often do you feel tired or fatigued after your sleep? a. Nearly every day b. 3–4 times a week c. 1–2 times a week d. 1–2 times a month e. Rarely or never 7. During your waking time, do you feel tired, fatigued or not up to par? a. Nearly every day b. 3–4 times a week c. 1–2 times a week d. 1–2 times a month e. Rarely or never 8. Have your ever nodded off or fallen asleep while driving a vehicle? If yes: 9. How often does this occur? a. Nearly every day b. 3–4 times a week c. 1–2 times a week d. 1–2 times a month e. Rarely or never Category 3 10. Do you have high blood pressure?	1. Snoring? (Do you snore loudly enough to disturb your bed partner or be heard through a closed door?) 2. Tired? (Do you often feel tired, fatigued or sleepy during the daytime?) 3. Observed? (Has anyone observed you stop breathing or gasping/choking for air while sleeping?) 4. Pressure? (Do you have high blood pressure?) 5. BMI ≥35 kg/m[2]? 6. Age >50 years old? 7. Neck size large? (Neck circumference ≥43 cm in men or ≥41 cm in women?) 8. Gender = male?
Scoring System
	Add ‘chance of dozing’ score for each question together	Add points for each category individually Category 1 Q1 and Q4: ‘yes’ = 1 point each Q2: ‘c’ or ‘d’ = 1 point Q3 and Q5: ‘a’ or ‘b’ = 1 point each Category 2 Q6 and Q7: ‘a’ or ‘b’ = 1 point each Q8: ‘a’ = 1 point	Each question answered ‘yes’ is given 1 point; then, sum the number of points
	Score Interpretation
Normal = 0–9 points Significant daytime sleepiness ≥10 points		Category 1: ‘positive’ if score ≥2 Category 2: ‘positive’ if score ≥ 2 Category 3: ‘positive’ if Q10 ‘yes’ and/or BMI ≥30 kg/m2 Low risk = none or one positive category High risk = two or all positive categories	Low risk = 0–2 points Intermediate risk = 3–4 points High risk ≥5 points