OSA Screening Tools Ranked by Real Accuracy Data

An estimated 936 million adults worldwide have mild-to-severe obstructive sleep apnea, and most have never been tested. This guide compares every validated OSA screening tool.

Tier 1: Questionnaires

STOP-Bang — an 8-item questionnaire. Sensitivity reaches 90% for any OSA, 96% for severe OSA in clinic populations.

Berlin Questionnaire — comparable sensitivity to STOP-Bang, reaching up to 98.8% at severe thresholds in some studies.

Epworth Sleepiness Scale — measures subjective sleepiness, not breathing directly. Sensitivity around 48%, best paired with another tool.

NoSAS Score — a simpler alternative, often with higher specificity than STOP-Bang.

Tier 2: Home Sleep Apnea Testing (HSAT)

Prescription-based portable devices measuring airflow, effort, and oxygen saturation directly. Recommended by sleep medicine bodies as a viable PSG alternative for appropriately selected patients.

Tier 3: Wearables and AI

A meta-analysis of 38 studies found pooled accuracy of 86.9%, sensitivity 93.8%, specificity 75.2% for detecting sleep apnea — though severity classification accuracy drops to 65.1%.

The Bottom Line

Start with STOP-Bang or Berlin (free, validated), add Epworth if sleepiness is prominent, then discuss HSAT with a clinician if your score is elevated. Try the Sleep Apnea Risk Screener.

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Disclaimer: This article is for educational purposes only and does not constitute medical advice.