New psychometric data from the Spanish versions of the Glasgow Dyspepsia Severity Score and the Dyspepsia-Related Health Scale measures
- Miren Orive Calzada 1
- Ane Antón 1
- Nerea González 1
- Begoña Matellanes Febrero 2
- Angel Padierna 1
- José Luis Cabriada Nuño 1
- Aitor Orive Calzada 3
- Víctor Orive Cura 4
- José María Quintana López 1
- 1 Hospital Galdakao-Usansolo
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2
Universidad de Deusto
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- 3 Hospital Universitario de Araba
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4
Hospital Universitario de Basurto
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ISSN: 2340-416, 1130-0108
Any de publicació: 2018
Volum: 110
Número: 1
Pàgines: 10-18
Tipus: Article
Altres publicacions en: Revista Española de Enfermedades Digestivas
Objectius de Desenvolupament Sostenible
Resum
Background and objective: There are no structural abnormalities in functional dyspepsia, therefore it is essential to have a viable questionnaire to measure treatment outcome according to patient perception. The aim of the study was to extensively document psychometric characteristics of the Glasgow Dyspepsia Severity Score and the Dyspepsia-Related Health Scale that are currently available in Spanish. Methods: Patients with functional dyspepsia (n = 158) were recruited from a randomized trial that assessed standard vs. standard and psychological treatment. Participants had completed the validation questionnaires and the Medical Outcome Study Short-form 36. Reliability (Cronbach’s alpha), validity (Confirmatory Factor Analysis, convergent and known group validity) and responsiveness (minimal clinically important difference) were analyzed. Results: A Confirmatory Factor Analysis of the Glasgow Dyspepsia Severity Score showed a one-factor solution model, but a low Cronbach’s alpha (0.61). With regard to the Dyspepsia-Related Health Scale, the Cronbach’s alpha (0.80-0.97) and Confirmatory Factor Analysis supported a model with four inter-correlated dimensions and suggested a need to improve the “Satisfaction with dyspepsia-related health” dimension (Cronbach’s alpha < 20). Finally, the global scores for both the Glasgow Dyspepsia Severity Score and the Dyspepsia-Related Health Scale were responsive at six months post-treatment, with a minimal clinically important difference of 4 and 6, respectively. Conclusions: Our findings support the continued application of the Dyspepsia-Related Health Scale and the need to improve the “Satisfaction with dyspepsia-related health” dimension. Although the Glasgow Dyspepsia Severity Score is a promising questionnaire, further review of the content is required to eliminate and add items in order to provide greater consistency to the evaluated construct.