Year 2018 / Volume 110 / Number 1
Original
New psychometric data from the Spanish versions of the Glasgow Dyspepsia Severity Score and the Dyspepsia-Related Health Scale measures

10-18

DOI: 10.17235/reed.2017.4911/2017

Miren Orive, Ane Antón-Ladislao, Nerea González, Begoña Matellanes, Jesús Ángel Padierna, José Luis Cabriada, Aitor Orive, Víctor Manuel Orive, José María Quintana,

Abstract
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.
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Orive M, Antón-Ladislao A, González N, Matellanes B, Padierna J, Cabriada J, et all. New psychometric data from the Spanish versions of the Glasgow Dyspepsia Severity Score and the Dyspepsia-Related Health Scale measures . 4911/2017


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Publication history

Received: 22/02/2017

Accepted: 14/09/2017

Online First: 16/11/2017

Published: 12/01/2018

Article revision time: 184 days

Article Online First time: 267 days

Article editing time: 324 days


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