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Related Concept Videos

Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs01:25

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Asthma is a chronic respiratory condition for which new therapeutic avenues, including anti-inflammatory drugs like mast cell stabilizers and anti-IgE treatments, continue to be developed.
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Related Experiment Video

Updated: Jun 18, 2026

Symptom Assessment of Patients with Allergic Rhinitis Using an Allergen Exposure Chamber
08:47

Symptom Assessment of Patients with Allergic Rhinitis Using an Allergen Exposure Chamber

Published on: March 3, 2023

The minimal clinically important difference in allergic rhinitis.

M L Barnes1, S Vaidyanathan, P A Williamson

  • 1Asthma & Allergy Research Group, Department of Medicine and Therapeutics, Ninewells Hospital & Medical School, University of Dundee, Scotland, UK. mr.mlbarnes@gmail.com

Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology
|November 10, 2009
PubMed
Summary
This summary is machine-generated.

This study calculated the minimal clinically important difference (MCID) for allergic rhinitis (AR) outcomes. MCIDs for quality of life, nasal airflow, and symptom scores were determined, aiding clinical interpretation of research findings.

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Area of Science:

  • Rhinology
  • Allergic Rhinitis Research
  • Clinical Outcome Measurement

Background:

  • Interpreting clinical research requires understanding statistical significance and clinical importance.
  • The minimal clinically important difference (MCID) links outcome measures to patient-perceived changes.
  • Limited MCID data exists in the Rhinology literature.

Purpose of the Study:

  • To calculate MCIDs for common subjective and objective outcome measures in allergic rhinitis (AR).

Main Methods:

  • Analysis of nine randomized, placebo-controlled trials in AR patients (n=204).
  • Utilized anchor- and distribution-based approaches.
  • Applied regression and meta-analysis techniques.

Main Results:

  • MCIDs established for Mini Rhinoconjunctivitis Quality of Life Questionnaire (0.4 units), peak nasal inspiratory flow (5 L/min), and total nasal symptoms score (0.55 units).
  • Nasal nitric oxide (NO) measurements did not correlate with patient-reported benefit.

Conclusions:

  • MCID estimates were derived for key subjective and objective rhinological outcomes.
  • Physicians and researchers should apply MCIDs for accurate interpretation of findings.
  • Application of MCIDs ensures clinical practice changes offer tangible patient benefit.