Cited by 585Chronic Obstructive Pulmonary Disease (COPD) ResearchHealth Systems, Economic Evaluations, Quality of LifeAsthma and respiratory diseases

Interpreting thresholds for a clinically significant change in health status in asthma and COPD

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Jones, P.W.·2002·European Respiratory Journal

Abstract

Health status (or Health-Related Quality of Life) measurement is an established method for assessing the overall efficacy of treatments for asthma and chronic obstructive pulmonary disease (COPD). Such measurements can indicate the potential clinical significance of a treatment's effect. This paper is concerned with methods of estimating the threshold of clinical significance for three widely used health status questionnaires for asthma and COPD: the Asthma Quality of Life Questionnaire, Chronic Respiratory Questionnaire and St George's Respiratory Questionnaire. It discusses the methodology used to obtain such estimates and shows that the estimates appear to be fairly reliable; i.e. for a given questionnaire, similar estimates may be obtained in different studies. These empirically derived thresholds are all mean estimates with confidence intervals around them. The presence of these confidence intervals affects the way in which the thresholds may be used to draw inferences concerning the clinical relevance of clinical trial results. A new system of judging the magnitude of clinically significant results is proposed. Finally, an attempt is made to translate these thresholds into scenarios that illustrate what a clinically significant change with treatment may mean to an individual patient.

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Crossref · 10.1183/09031936.02.00063702

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Research works printed but not linked: 3

  1. [10]10. Jones PW, Quirk FH, Baveystock CM, Littlejohns P. A self-complete measure for chronic airflow limitation -the St George9s Respiratory Questionnaire. Am Rev Respir Dis 1992; 145: 1321-1327.
  2. [12]12. Jones PW, Quirk FH, Baveystock CM. The St George9s Respiratory Questionnaire. Respir Med 1991; 85: 25-31.
  3. [15]15. Jones PW, Lasserson D. Relationship between change in St George9s Respiratory Questionnaire score and patients9 perception of treatment efficacy after one year of therapy with nedocromil sodium. Am Rev Respir Crit Care Med 1994; 149: A211.

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Authors
Jones, P. W.
Affiliations
St George's, University of London (GB)
Corresponding author
Jones, P.W.
Venue
European Respiratory Journal
Published
2002-03
Volume
19
Issue
3
Pages
398-404
ISSN
  • 0903-1936 (ISSN-L)
  • 1399-3003
OpenAlex
W2141887601
Cited by
585
References
22
Citations by year
2026: 12 · 2025: 8 · 2024: 5 · 2023: 11 · 2022: 17 · 2021: 26 · 2020: 40 · 2019: 30 · 2018: 21 · 2017: 33 · 2016: 22 · 2015: 32 · 2014: 40 · 2013: 37 · 2012: 22
FWCI
22.66
Type
journal article
Language
en
Open access
Locations
  • European Respiratory Journal (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Chronic Obstructive Pulmonary Disease (COPD) Research
  • Social Sciences › Economics, Econometrics and Finance › Economics and Econometrics › Health Systems, Economic Evaluations, Quality of Life
  • Health Sciences › Medicine › Physiology › Asthma and respiratory diseases
Keywords
clinically significant change, health-related quality of life, asthma, chronic obstructive pulmonary disease, Asthma Quality of Life Questionnaire, Chronic Respiratory Questionnaire, St George's Respiratory Questionnaire, confidence intervals
MeSH terms
Asthma, Female, Health Status, Health Status Indicators, Humans, Male, Prognosis, Quality of Life, Surveys and Questionnaires, Respiratory Function Tests, Sensitivity and Specificity, Severity of Illness Index, Reproducibility of Results, Confidence Intervals, Treatment Outcome, Patient Satisfaction, Pulmonary Disease, Chronic Obstructive

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