NoSAS Score (OSA screen)
NoSAS score (Marti-Soler 2016): screens for sleep-disordered breathing (0-17) from neck circumference, BMI, snoring, age, and sex.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Neck circumference
- 42
- BMI
- 31
- Age
- 58
- Male sex
- Yes
Result: NoSAS 15/17: >= 8 -- high probability of sleep-disordered breathing; consider sleep evaluation.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Threshold
- a score of >= 8 indicates a high probability of clinically significant sleep-disordered breathing; complementary to STOP-BANG.
What you enter
- Neck circumference (cm)
- BMI (kg/m^2)
- Age (years)
- Snoring
- Male sex
How this is calculated
- Components
- neck > 40 cm (4), BMI 25 to < 30 (3) or >= 30 (5), snoring (2), age > 55 (4), and male sex (2), summed 0-17.
Marti-Soler H, Hirotsu C, Marques-Vidal P, et al. The NoSAS score for screening of sleep-disordered breathing: a derivation and validation study. Lancet Respir Med. 2016;4(9):742-748. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.