New psychometric data from the Spanish versions of the Glasgow Dyspepsia Severity Score and the Dyspepsia-Related Health Scale measures.

作者信息

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

机构信息

Research Unit, Galdakao-Usansolo Hospital // Health Services Research on Chronic Patients Network (REDISSEC), ESPAÑA.

Research Unit, Galdakao-Usansolo Hospital // Health Services Research on Chronic Patients Network (REDISSEC).

出版信息

Rev Esp Enferm Dig. 2018 Jan;110(1):10-18. doi: 10.17235/reed.2017.4911/2017.

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.