CoChat
Sign Up
Cited by 265Chronic Obstructive Pulmonary Disease (COPD) ResearchHealth Systems, Economic Evaluations, Quality of LifeAsthma and respiratory diseases

The DOI matches its Crossref record; 21 of the 21 references it cites were found in a registry or an index.

Comparison of Discriminative Properties among Disease-specific Questionnaires for Measuring Health-related Quality of Life in Patients with Chronic Obstructive Pulmonary Disease

HAJIRO, TAKASHI, NISHIMURA, KOICHI, TSUKINO, MITSUHIRO, IKEDA, AKIHIKO, KOYAMA, HIROSHI, IZUMI, TAKATERU·1998·American Journal of Respiratory and Critical Care Medicine
DOI 10.1164/ajrccm.157.3.9703055
Open this paper in CoChat — free account

Abstract

Three disease-specific, health-related quality of life (HRQL) questionnaires have been introduced to assess patients with chronic obstructive pulmonary disease (COPD): the St. George's Respiratory Questionnaire (SGRQ), the Breathing Problems Questionnaire (BPQ), and the Chronic Respiratory Disease Questionnaire (CRQ). The purpose of the present study was to make comparisons between the SGRQ, the BPQ, and the CRQ in their discriminative properties, and to clarify the characteristics of each questionnaire. One hundred forty-three patients with mild to severe COPD completed pulmonary function tests, progressive cycle ergometer testing for exercise capacity, assessment of dyspnea, anxiety, and depression, and assessment of HRQL. The frequency distributions of the questionnaire scores showed that the SGRQ and the CRQ were normally distributed and that the BPQ was skewed toward low scores. Relationships between all dimensions of the three questionnaires were significant (correlation coefficients [Rs] = 0.74 to 0.86). The three questionnaires had significant but weak correlations (Rs = -0.24 to -0.36) with some physiologic variables (VC, FEV1, and DL(CO)/VA) and mild to moderate correlations with exercise capacity and assessment of dyspnea, anxiety, and depression. Stepwise multiple regression analyses revealed that the Baseline Dyspnea Index (BDI) score, anxiety by the Hospital Anxiety Depression Scale (HAD), and maximal oxygen uptake (VO2max) accounted for 61% of the variance in the SGRQ and that the BDI and anxiety of the HAD accounted for 53 and 49% of the variance in the BPQ and the CRQ, respectively. Dyspnea and psychologic status impacted the HRQL in patients with COPD. Although no substantial differences between the SGRQ, the BPQ, and the CRQ were evident in the correlations with physiologic parameters and the influential factors, the BPQ was found to be less discriminatory than the SGRQ and the CRQ in evaluating HRQL cross-sectionally.

Overview

Integrity signals

Registry

Crossref · 10.1164/ajrccm.157.3.9703055

Cites

21 of 21 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Verification

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Citations

Cites

Flagged first, then by citations

Show all 21 references

Research works printed but not linked: 1

  1. Medical Section of the American Lung Association, 1994, Standardization of spirometry: 1994 update., Am. Rev. Respir. Dis., 152, 1107

Cited by

Sorted by citations

Items 201–264 of 264

Related

See all

Metadata

Authors
HAJIRO, T., NISHIMURA, K., TSUKINO, M., IKEDA, A., KOYAMA, H., & IZUMI, T.
Affiliations
Kyoto University (JP)
ORCID
Venue
American Journal of Respiratory and Critical Care Medicine
Publisher
Oxford University Press (OUP)
Published
1998-03-01
Volume
157
Issue
3
Pages
785-790
ISSN
  • 1073-449X (ISSN-L)
  • 1535-4970
DOI
10.1164/ajrccm.157.3.9703055
OpenAlex
W2071805440
Cited by
265
References
21
Citations by year
2026: 3 · 2025: 3 · 2024: 2 · 2023: 8 · 2021: 8 · 2020: 7 · 2019: 6 · 2018: 6 · 2017: 11 · 2016: 8 · 2015: 8 · 2014: 13 · 2013: 14 · 2012: 14
FWCI
7.36
Type
journal article
Language
en
Open access
closed
Licence
academic.oup.com/pages/standard-publication-reuse-rights (vor)
Locations
  • American Journal of Respiratory and Critical Care Medicine (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 › Pulmonary and Respiratory Medicine › Asthma and respiratory diseases
Keywords
chronic obstructive pulmonary disease, health-related quality of life, disease-specific questionnaire, St George's Respiratory Questionnaire, Chronic Respiratory Questionnaire, dyspnea, anxiety, depression, exercise capacity, VO2max, lung function
MeSH terms
Aged, Aged, 80 and over, Anxiety, Cross-Sectional Studies, Depression, Dyspnea, Evaluation Studies as Topic, Exercise Test, Forced Expiratory Volume, Health Status, Humans, Lung Diseases, Obstructive, Middle Aged, Oxygen Consumption, Pulmonary Diffusing Capacity, Quality of Life, Surveys and Questionnaires, Regression Analysis, Respiration, Respiratory Function Tests, Vital Capacity, Discriminant Analysis, Exercise Tolerance

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review