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27-06-2018 | Brief Communication | Uitgave 10/2018

Quality of Life Research 10/2018

Cross-cultural validation of the German version of the Four-Dimensional Symptom Questionnaire (4DSQ) in multimorbid elderly people

Tijdschrift:
Quality of Life Research > Uitgave 10/2018
Auteurs:
Anna Exner, Maria Kleinstäuber, Wolfgang Maier, Angela Fuchs, Juliana J. Petersen, Ingmar Schäfer, Jochen Gensichen, Steffi G. Riedel-Heller, Siegfried Weyerer, Horst Bickel, Hans-Helmut König, Birgitt Wiese, Gerhard Schön, Martin Scherer, Hendrik van den Bussche, Berend Terluin
Belangrijke opmerkingen

Electronic supplementary material

The online version of this article (https://​doi.​org/​10.​1007/​s11136-018-1924-2) contains supplementary material, which is available to authorized users.

Abstract

Purpose

Psychosomatic symptoms and mental health problems are highly prevalent in multimorbid elderly people challenging general practitioners to differentiate between normal stress and psychopathological conditions. The 4DSQ is a Dutch questionnaire developed to detect anxiety, depression, somatization, and distress in primary care. This study aims to analyze measurement equivalence between a German version and the original Dutch instrument.

Methods

A Dutch and a German sample of multimorbid elderly people, matched by gender and age, were analyzed. Equivalence of scale structures was assessed by confirmatory factor analysis (CFA). To evaluate measurement equivalence across languages, differential item functioning (DIF) was analyzed using Mantel–Haenszel method and hybrid ordinal logistic regression analysis. Differential test functioning (DTF) was assessed using Rasch analysis.

Results

A total of 185 German and 185 Dutch participants completed the questionnaire. The CFA confirmed one-factor models for all scales of both 4DSQ versions. Nine items in three scales were flagged with DIF. The anxiety scale showed to be free of DIF. DTF analysis revealed negligible scale impact of DIF.

Conclusions

The German 4DSQ demonstrated measurement equivalence to the original Dutch instrument. Hence, it can be considered a valid questionnaire for the screening for mental health problems in primary care.

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Extra materiaal
Online Supplementary Appendix (DOCX 35 KB)
11136_2018_1924_MOESM1_ESM.docx
Literatuur
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