Trial reportHealth and quality of life outcomes2004
Self-administration and interviewer-administration of the German Chronic Respiratory Questionnaire: instrument development and assessment of validity and reliability in two randomised studies.
Trial report in Health and quality of life outcomes, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
31 citing papers in PubMed, 393 citations in OpenAlex.
- Trial
- Trial
- Comparison of face-to-face interview and telephone interview administration of COPD assessment test: a randomized study.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2014Trial
- Trial
- Dyspnea after a first episode of pulmonary embolism: prevalence, predictors and long-term associations with health-related quality of life.Frontiers in cardiovascular medicine · 2025Article
- Anxiety Inventory for Respiratory Disease: Cross-Cultural Adaptation and Semantic Validity of the Brazilian Version for Individuals with Chronic Obstructive Pulmonary Disease.Journal of multidisciplinary healthcare · 2024Article
- Article
- The German version of the Pulmonary Embolism Quality of Life (PEmb-QoL) questionnaire: reliability, responsiveness and structural validity.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2022Article
- Effectiveness of Pulmonary Rehabilitation in Severe and Critically Ill COVID-19 Patients: A Controlled Study.International journal of environmental research and public health · 2021Article
- Outcomes of community-based and home-based pulmonary rehabilitation for pneumoconiosis patients: a retrospective study.BMC pulmonary medicine · 2018Article
- Whole-Body Vibration Training During a Low Frequency Outpatient Exercise Training Program in Chronic Obstructive Pulmonary Disease Patients: A Randomized, Controlled Trial.Journal of clinical medicine research · 2017Article
- Validation of the chronic respiratory questionnaire in the Colombian population with chronic obstructive pulmonary disease.Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation · 2015Article
- Correlation between health-related quality of life in veterans with chronic spinal cord injury and their caregiving spouses.Archives of trauma research · 2014Article
- Validation of prediction models based on lasso regression with multiply imputed data.BMC medical research methodology · 2014Article
- Prediction of COPD-specific health-related quality of life in primary care COPD patients: a prospective cohort study.NPJ primary care respiratory medicine · 2014Article
- Comparison of depression, anxiety and long-term quality of health in patients with a history of either primary closure or Limberg flap reconstruction for pilonidal sinus.Clinics (Sao Paulo, Brazil) · 2014Article
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- Beyond FEV₁ in COPD: a review of patient-reported outcomes and their measurement.International journal of chronic obstructive pulmonary disease · 2012Review
- Interviewer versus self-administered health-related quality of life questionnaires - does it matter?Health and quality of life outcomes · 2011Article
- Characteristics of Dutch and Swiss primary care COPD patients - baseline data of the ICE COLD ERIC study.Clinical epidemiology · 2011Article
Corrections and comments
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Authors and funding
8 authors at 5 institutions in 4 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundAssessment of health-related quality of life (HRQL) is important in patients with chronic obstructive pulmonary disease (COPD). Despite the high prevalence of COPD in Germany, Switzerland and Austria there is no validated disease-specific instrument available. The objective of this study was to translate the Chronic Respiratory Questionnaire (CRQ), one of the most widely used respiratory HRQL questionnaires, into German, develop an interviewer- and self-administered version including both standardised and individualised dyspnoea questions, and validate these versions in two randomised studies.
methodsWe recruited three groups of patients with COPD in Switzerland, Germany and Austria. The 44 patients of the first group completed the CRQ during pilot testing to adapt the CRQ to German-speaking patients. We then recruited 80 patients participating in pulmonary rehabilitation programs to assess internal consistency reliability and cross-sectional validity of the CRQ. The third group consisted of 38 patients with stable COPD without an intervention to assess test-retest reliability. To compare the interviewer- and self-administered versions, we randomised patients in groups 2 and 3 to the interviewer- or self-administered CRQ. Patients completed both the standardised and individualised dyspnoea questions.
resultsFor both administration formats and all domains, we found good internal consistency reliability (Crohnbach's alpha between 0.73 and 0.89). Cross-sectional validity tended to be better for the standardised compared to the individualised dyspnoea questions and cross-sectional validity was slightly better for the self-administered format. Test-retest reliability was good for both the interviewer-administered CRQ (intraclass correlation coefficients for different domains between 0.81 and 0.95) and the self-administered format (intraclass correlation coefficients between 0.78 and 0.86). Lower within-person variability was responsible for the higher test-retest reliability of the interviewer-administered format while between person variability was similar for both formats.
conclusionsInvestigators in German-speaking countries can choose between valid and reliable self-and interviewer-administered CRQ formats.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.