STOP-BANG screens for obstructive sleep apnea with eight yes or no questions about snoring, tiredness, blood pressure, and body measurements. It takes under a minute and catches most cases that a sleep lab would later confirm.
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The condition that hides behind tiredness
Obstructive sleep apnea repeatedly collapses the upper airway during sleep, dropping oxygen and fracturing rest dozens or hundreds of times a night. Most sufferers have no idea. They know only that they wake unrefreshed, doze at meetings, and hear complaints about their snoring. Left alone the condition feeds hypertension, atrial fibrillation, insulin resistance, and car accidents. Because a formal sleep study costs time and money, anesthesiologists developed STOP-BANG to sort surgical patients quickly, and it has since spread into primary care worldwide.
Decoding the eight letters
The acronym spells the questions. S asks about loud snoring, T about daytime tiredness, O whether anyone has observed you stop breathing, and P about blood pressure treatment. BANG covers the physical factors, a BMI over 35, age above 50, a neck larger than 40 cm, and male sex. Each yes scores one point. Zero to two reads as low risk, three to four as intermediate, and five or more as high.
Why sensitivity beats specificity here
The designers optimized STOP-BANG to miss very few true cases. A score of three or more catches the large majority of moderate to severe apnea, which is exactly what a screening tool should do. The trade off is false alarms. Many people at intermediate scores sleep fine, and only a sleep study or home apnea test can settle the question. Think of your score as a decision about whether to test further, never as the diagnosis itself.
Signals the score cannot weigh
Some clues bypass the questionnaire entirely. Waking with headaches, needing naps despite long nights, a bed partner describing gasping, or resistant hypertension on three medications all justify a sleep evaluation regardless of points. On the treatment side the news is genuinely good. Modern pressure therapy is quiet and comfortable, oral appliances help milder cases, and weight loss of 10 percent can cut severity dramatically. The first step is simply knowing to ask.