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. 2003 Oct 28:1:62.
doi: 10.1186/1477-7525-1-62.

Psychometric validation of the German translation of the Gastrointestinal Symptom Rating Scale (GSRS) and Quality of Life in Reflux and Dyspepsia (QOLRAD) questionnaire in patients with reflux disease

Károly R Kulich  1 , Peter Malfertheiner, Ahmed Madisch, Joachim Labenz, Ekkehard Bayerdörffer, Stephan Miehlke, Jonas Carlsson, Ingela K Wiklund
Affiliations

Psychometric validation of the German translation of the Gastrointestinal Symptom Rating Scale (GSRS) and Quality of Life in Reflux and Dyspepsia (QOLRAD) questionnaire in patients with reflux disease

Károly R Kulich et al. Health Qual Life Outcomes. .

Abstract

Background: Symptoms of heartburn has an impact on health-related quality of life (HRQL). When a questionnaire is translated into a new language, a linguistic validation is necessary but not sufficient unless the psychometric characteristics have been verified. The aim is to document the psychometric characteristics of the German translation of the Gastrointestinal Symptom Rating Scale (GSRS) and Quality of Life in Reflux and Dyspepsia (QOLRAD) questionnaire.

Methods: 142 patients with symptoms of heartburn (Age: M = 47.5, +/- 14.6; Males = 44.4%) completed the German translation of GSRS, the QOLRAD, the Short-Form-36 (SF-36) and the Hospital Anxiety and Depression (HAD) scale.

Results: The internal consistency reliability of GSRS ranged from 0.53-0.91 and of QOLRAD from 0.90-0.94, respectively. The test-retest reliability of GSRS ranged from 0.49-0.73 and of QOLRAD from 0.70-0.84. The relevant domains of the GSRS and QOLRAD domain scores significantly correlated. GSRS domains of Abdominal Pain and Constipation correlated (negatively) with most of the domains of the SF-36. The relevant QOLRAD domains significantly correlated with all SF-36 domains.

Conclusions: The psychometric characteristics of the German translation of GSRS and QOLRAD were found to be good, with satisfactory reliability and validity. The reliability of the GSRS Abdominal Pain domain was moderate.

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Figures

Figure 1
Figure 1
Physician-assessed overall severity and frequency of symptoms and the GSRS domain scores.
Figure 2
Figure 2
Physician-assessed overall severity and frequency of symptoms and the QOLRAD domain scores.
See this image and copyright information in PMC

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