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Arch Otolaryngol Head Neck Surg. 2011 Aug;137(8):792-7. doi: 10.1001/archoto.2011.120.

Use of the modified SNOT-16 in primary care patients with clinically diagnosed acute rhinosinusitis.

Author information

1
Department of Medicine, Washington University School of Medicine, Washington University, St Louis, MO 63110, USA. jgarbutt@dom.wustl.edu

Abstract

OBJECTIVE:

To determine the reliability, validity, responsiveness, and the minimal important difference (MID) for the Sinonasal Outcome Test-16 (SNOT-16) in the measurement of disease-specific quality of life (QOL) in adults with acute rhinosinusitis.

STUDY DESIGN:

Randomized controlled trial to evaluate antibiotic treatment for acute rhinosinusitis.

SETTING:

Ten community practices in St Louis, Missouri.

METHODS:

The modified SNOT-16 was completed at baseline (by both face-to-face and telephone interviews) and by telephone interview at 3, 7, and 10 days by 166 adults with acute rhinosinusitis diagnosed clinically using standardized criteria (36% were male, 78% were white). Considering severity and frequency, patients rated how much they were bothered by each item using a 4-point scale. The mean SNOT-16 score (ranging from 0 [no problem] to 3 [large problem]) was compared with the patients' global assessment of change to evaluate responsiveness and the MID.

RESULTS:

The instrument was easy to use and took less than 5 minutes to complete. The SNOT-16 score identified statistically significant differences in the hypothesized direction for those reporting more or less severe symptoms (P = .02) and more or less bother (P < .001) demonstrating construct-related validity. The Cronbach α ranged from 0.82 to 0.91, demonstrating high internal consistency. There was a statistically significant decrease in scores with time (multivariate analysis of variance, P < .001). The effect sizes at days 3, 7, and 10 were 1.45, 2.34, and 2.90, respectively, indicating high sensitivity to clinical change. The MID was 0.5 units.

CONCLUSION:

The modified SNOT-16 is a valid instrument to assess effectiveness of interventions to improve disease-specific QOL in adults with acute rhinosinusitis.

TRIAL REGISTRATION:

clinicaltrials.gov Identifier: NCT00377403.

PMID:
21844413
PMCID:
PMC3671945
DOI:
10.1001/archoto.2011.120
[Indexed for MEDLINE]
Free PMC Article
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