What is obstructive sleep apnea?
Obstructive sleep apnea (OSA) is a common sleep disorder in which the muscles around your airway relax during sleep and briefly block your breathing, over and over through the night. Each pause can last several seconds and ends with a micro-arousal as your brain nudges you awake just enough to breathe again. You usually don't remember these awakenings, but they shatter your sleep architecture, robbing you of the deep sleep and REM your body needs. The result is the hallmark symptom: sleeping a "full night" yet feeling exhausted every morning.
OSA is more than an inconvenience. Left untreated, the repeated drops in oxygen and surges of stress hormones are linked to high blood pressure, heart disease, stroke, type 2 diabetes, and a higher risk of accidents from daytime sleepiness. The good news is that it is highly treatable once identified.
What does STOP-BANG measure?
STOP-BANG is a clinically validated screening questionnaire built from eight yes/no risk factors. The name is an acronym, and each letter is one question:
- S — Snoring: Do you snore loudly (louder than talking, or audible through a closed door)?
- T — Tiredness: Do you often feel tired or sleepy during the day?
- O — Observed apnea: Has anyone seen you stop breathing, gasp, or choke in your sleep?
- P — Pressure: Do you have, or are you treated for, high blood pressure?
- B — BMI: Is your body mass index over 35 kg/m²?
- A — Age: Are you over 50?
- N — Neck: Is your neck circumference greater than 40 cm (about 15.75 in)?
- G — Gender: Are you male?
Each "yes" scores one point, for a total out of eight. The first four (STOP) capture symptoms; the last four (BANG) capture physical risk factors. Together they estimate the probability that you have obstructive sleep apnea.
What your score means
- 0–2 (low risk): Obstructive sleep apnea is unlikely. If you still feel chronically unrefreshed, look at timing and habits first.
- 3–4 (intermediate risk): Enough risk factors to be worth raising with your doctor, especially if you snore loudly or wake up tired most days.
- 5–8 (high risk): A high probability of moderate-to-severe sleep apnea. Speak with a doctor or sleep specialist about a sleep study.
Remember that a screener estimates probability, not a diagnosis. Only a sleep study — either an in-lab polysomnogram or a home sleep apnea test — can confirm OSA and gauge its severity.
When to see a doctor
Book an appointment if you score intermediate or high, if a partner has witnessed you stop breathing, or if you experience loud habitual snoring, morning headaches, or daytime sleepiness that affects your driving or work. These are exactly the situations sleep medicine exists to help with, and treatments — from weight management and positional therapy to CPAP machines and oral appliances — can dramatically improve both your energy and your long-term health.
If your score is low but you're still tired, the cause may be timing or quantity rather than a disorder. Try aligning your wake-up with a complete cycle using the sleep calculator, check the recommended hours for your age, and track whether you're carrying sleep debt.