About STOP-BANG Sleep Apnea Screening
Obstructive sleep apnea (OSA) is a common but underdiagnosed condition that causes breathing to stop and start repeatedly during sleep. Globally, an estimated 1 billion adults aged 30-69 have OSA, yet as many as 80% of moderate-to-severe cases remain undiagnosed. Left untreated, OSA raises the risk of high blood pressure, type 2 diabetes, atrial fibrillation, heart attack, stroke, and motor vehicle accidents caused by daytime sleepiness. The STOP-BANG questionnaire is a validated, eight-item screening tool used worldwide by sleep specialists, surgeons, and primary care clinicians to quickly identify people who should undergo formal sleep testing. Each item addresses a major risk factor: loud snoring, daytime tiredness, observed breathing pauses, high blood pressure, body mass index over 35, age over 50, large neck circumference, and male gender. Scores range from 0 to 8, with 3 or more points indicating intermediate risk and 5 or more points indicating high risk. This calculator lets you complete the questionnaire privately, see your score, and understand whether a conversation with a healthcare provider about a sleep study is warranted.
How It Works
The calculator presents eight yes-or-no questions drawn directly from the STOP-BANG screening tool. You answer each question with 1 for yes or 0 for no. The calculator sums your responses into a total score from 0 to 8. It then maps that score to a risk category: 0-2 points is low risk, 3-4 points is intermediate risk, and 5-8 points is high risk for obstructive sleep apnea. The result is a screening output, not a diagnosis.
Formula & Calculation Logic
Score = sum of positive answers across 8 domains. Low risk = 0-2 points. Intermediate risk = 3-4 points. High risk = 5-8 points. The original validation studies found that a cutoff of 3 or more provides high sensitivity for detecting moderate-to-severe OSA, while 5 or more strongly suggests a higher probability of the condition. Neck circumference is defined as greater than 16 inches or 40 centimeters, and BMI threshold is greater than 35 kg/m².
Step-by-Step Guide
- Step 1: Answer yes or no to each of the eight STOP-BANG questions honestly.
- Step 2: The calculator assigns 1 point for every yes answer and 0 for every no answer.
- Step 3: It adds the points to produce a total score between 0 and 8.
- Step 4: The tool displays your risk category based on the score thresholds.
- Step 5: If your score is 3 or higher, consider discussing the result with a healthcare provider about a formal sleep evaluation.
Example Calculations
- Scenario 1: A 45-year-old with loud snoring and daytime tiredness but no other risk factors scores 2, which falls into the low-risk category but still merits monitoring.
- Scenario 2: A 55-year-old male with high blood pressure, observed breathing pauses, a BMI over 35, and a large neck scores 6, indicating high risk and a strong reason to pursue a sleep study.
Common Use Cases
- Screening for OSA risk before a primary care or sleep medicine appointment
- Preoperative surgical risk assessment when anesthesia may affect breathing
- Evaluating unexplained daytime fatigue, morning headaches, or concentration problems
- Monitoring risk reduction after weight loss or CPAP treatment
Pro Tips
- Ask a sleep partner about observed breathing pauses; self-reporting this symptom is often inaccurate.
- Measure your neck circumference accurately at the level of the laryngeal prominence (Adam's apple).
- Use a BMI calculator to confirm whether your body mass index is above 35.
- A high score is a signal to seek evaluation, not proof that you have sleep apnea.
Common Mistakes to Avoid
- Treating the score as a definitive diagnosis instead of a screening result.
- Ignoring symptoms because they have persisted for years and feel normal.
- Answering questions inaccurately because of embarrassment or lack of information.
- Waiting for severe symptoms before seeking help; early detection prevents complications.
Why Use This Tool?
- Identifies people who may benefit from a formal sleep study
- Helps reduce the risk of cardiovascular and metabolic complications
- Improves daytime alertness and lowers accident risk
- Provides a quick, evidence-based way to start a conversation with a clinician