Sino-Nasal Outcome Test (SNOT-22)

Health-related symptom burden in chronic rhinosinusitis, 22 items each 0-5 (range 0-110); higher = worse.

Evidence tier: Validated instrument.

Formula / logic

Sum of 22 items, each 0 (no problem) to 5 (as bad as it can be); range 0-110. Higher = worse. Minimal clinically important difference ≈ 8.9 points. (Severity bands shown are commonly-cited approximations; the original instrument defines no fixed bands.)

Interpretation

Validated CRS outcome measure used to gauge symptom burden and treatment response (including before/after sinus surgery or biologic therapy).

Evidence & citations

  1. Hopkins C, Gillett S, Slack R, Lund VJ, Browne JP. Psychometric validity of the 22-item Sinonasal Outcome Test. Clin Otolaryngol. 2009;34(5):447-454. PMID 19793277

Clinician decision support. Verify against the cited source. Not a substitute for clinical judgment. 100% on-device; no patient data is stored or transmitted.