AHI / ODI Severity Classifier
AHI / ODI severity band (AASM): classifies obstructive sleep apnea severity from the apnea-hypopnea or oxygen-desaturation index (normal / mild / moderate / severe).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- AHI
- 22
Result: AHI 22/hr: moderate obstructive sleep apnea (AASM bands -- normal < 5, mild 5-<15, moderate 15-<30, severe >= 30).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- AHI
- normal < 5, mild 5 to < 15, moderate 15 to < 30, and severe >= 30 events per hour.
- Criterion
- the ODI is shown alongside; the 4% rule (CMS) scores fewer events than the recommended 3%-or-arousal rule, so the same patient can cross a band by which rule is applied.
What you enter
- AHI (events/hr)
- ODI (events/hr)
- Desaturation criterion
How this is calculated
American Academy of Sleep Medicine Task Force. Sleep-related breathing disorders in adults: recommendations for syndrome definition and measurement techniques in clinical research. Sleep. 1999;22(5):667-689. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.