The STOP-BANG questionnaire explained — how doctors screen for sleep apnea risk
When clinicians suspect sleep apnea, they often begin with a structured screening tool.
One of the most widely used tools worldwide is the STOP-BANG questionnaire.
It is simple, quick, and evidence-based.
It does not diagnose sleep apnea — but it helps identify who is at higher risk and should undergo formal testing.
What does STOP-BANG stand for?
STOP-BANG is an acronym representing eight risk factors:
S — Snoring
T — Tiredness
O — Observed apneas
P — High blood Pressure
B — Body mass index (BMI)
A — Age
N — Neck circumference
G — Gender
Each item is answered with “Yes” or “No.”
The eight questions
You receive one point for each “Yes” answer.
STOP section:
- Do you snore loudly?
- Do you often feel tired, fatigued, or sleepy during the daytime?
- Has anyone observed you stop breathing during sleep?
- Do you have high blood pressure?
BANG section:
- Is your BMI greater than 35?
- Are you over 50 years old?
- Is your neck circumference greater than 40 cm (approximately 16 inches)?
- Are you male?
How scoring works
Scores range from 0 to 8.
- 0–2 points: Low risk
- 3–4 points: Intermediate risk
- 5–8 points: High risk
Higher scores are associated with greater likelihood of moderate to severe obstructive sleep apnea.
In particular, three or more positive answers suggest that further evaluation may be appropriate.
Why STOP-BANG is useful
The questionnaire is:
- Quick to complete
- Easy to interpret
- Validated in many clinical settings
- Widely used in hospitals and sleep clinics
It is often used before surgery to identify patients who may have undiagnosed sleep apnea.
It helps guide decisions about who should undergo formal sleep testing.
Limitations
STOP-BANG is a screening tool — not a diagnostic test.
It cannot:
- Confirm sleep apnea
- Determine severity
- Measure oxygen levels
- Replace a sleep study
Some individuals with low scores may still have sleep apnea.
Some individuals with high scores may not.
Clinical judgment and objective testing are essential.
When should you act on your score?
You should consider discussing testing if:
- Your score is 3 or higher
- You have loud snoring plus observed breathing pauses
- You have resistant high blood pressure
- You experience excessive daytime sleepiness
The combination of symptoms and risk factors increases the probability.
The key takeaway
The STOP-BANG questionnaire is a practical and reliable screening tool used by healthcare professionals to estimate sleep apnea risk.
It is not a diagnosis, but it helps identify who may benefit from formal testing.
If your score suggests intermediate or high risk — especially alongside symptoms — structured sleep evaluation may be the next reasonable step.