Cross-cultural validation of the Turkish Four-Dimensional Symptom Questionnaire (4DSQ) using differential item and test functioning (DIF and DTF) analysis

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Terluin B., Unalan P. C. , Sipahioglu N. T. , Ozkul S. A. , van Marwijk H. W. J.

BMC FAMILY PRACTICE, cilt.17, 2016 (SCI İndekslerine Giren Dergi) identifier identifier identifier


Background: The Four-Dimensional Symptom Questionnaire (4DSQ) is originally a Dutch 50 item questionnaire developed in primary care to assess distress, depression, anxiety and somatization. We aimed to develop and validate a Turkish translation of the 4DSQ.