Related Experiment Video
Updated: Jun 19, 2026
08:47
Symptom Assessment of Patients with Allergic Rhinitis Using an Allergen Exposure Chamber
Published on: March 3, 2023
Psychometric validity of the 22-item Sinonasal Outcome Test
Summary
The Sinonasal Outcome Test (SNOT-22) is a valid and reliable tool for assessing health-related quality of life in chronic rhinosinusitis patients. This validated instrument aids in clinical practice and surgical outcome measurement.
Area of Science:
- Otolaryngology
- Quality of Life Research
- Health Outcomes Measurement
Background:
- Chronic rhinosinusitis (CRS) significantly impacts patient quality of life.
- Existing instruments for measuring health-related quality of life (HRQoL) in CRS require validation.
- The Sinonasal Outcome Test-22 (SNOT-22) is a modification of the SNOT-20, designed for CRS assessment.
Purpose of the Study:
- To psychometrically validate the SNOT-22 instrument for use in patients with chronic rhinosinusitis.
- To assess the SNOT-22's reliability, validity, and responsiveness to clinical change.
- To establish the minimally important difference (MID) for the SNOT-22.
Main Methods:
- A prospective cohort study involving 3128 adult patients undergoing sinonasal surgery across 87 NHS hospitals.
- Data collected preoperatively and at 3 months post-surgery.
- Test-retest reliability assessed in a separate single-center cohort.
Main Results:
- High internal consistency (Cronbach's alpha = 0.91) and test-retest reliability (coefficient = 0.93) were observed for the SNOT-22.
- The SNOT-22 effectively discriminated between CRS patients and healthy controls (P < 0.0001).
- A statistically significant decrease in SNOT-22 scores was noted post-surgery (P < 0.0001), with a large effect size (0.81). The MID was determined to be 8.9 points.
Conclusions:
- The SNOT-22 is a valid, reliable, and user-friendly instrument for assessing HRQoL in CRS.
- It can be utilized in routine clinical practice to gauge the impact of CRS and measure surgical outcomes.
- The established MID aids in interpreting SNOT-22 scores and may inform patient selection for surgery.
Related Concept Videos
01:22Self-Report Tests of Personality
Self-report inventories are objective personality assessments that use multiple-choice items or numbered scales, typically ranging from 1 (strongly disagree) to 5 (strongly agree). They are often called Likert scales after Rensis Likert. These inventories are widely used due to their ease of administration and cost-effectiveness. One of the most prominent examples is the Minnesota Multiphasic Personality Inventory (MMPI), initially developed in the 1940s to assess abnormal personality traits.
01:23McNemar's Test
McNemar's Test is a nonparametric statistical test used to determine if there is a significant difference in proportions between two related groups when the outcome is binary (e.g., yes/no, success/failure). It is beneficial when we have paired data, such as pre-test/post-test designs, where the same subjects are measured under two different conditions. The test is named after the statistician Quinn McNemar, who introduced it in 1947. It is commonly used in situations where subjects are...
01:28Physical Assessment of the Respiratory Tract I: Health History
Physical assessment of the respiratory tract is critical to patient care. It allows healthcare professionals to identify and manage various respiratory conditions. The process involves a combination of subjective and objective data collection.
Subjective Data
Subjective data provides vital information about the patient's health history and symptoms. This data is typically collected through interviews in which patients describe their experiences, symptoms, and concerns.
Health history and key...
Subjective Data
Subjective data provides vital information about the patient's health history and symptoms. This data is typically collected through interviews in which patients describe their experiences, symptoms, and concerns.
Health history and key...