TURKISH VERSION OF MASSACHUSETTS GENERAL HOSPITAL COGNITIVE AND PHYSICAL FUNCTIONING QUESTIONNAIRE: A RELIABILITY AND VALIDITY STUDY

Objectives: Massachusetts General Hospital Cognitive and Physical Functioning Questionnaire (CPFQ) is a questionnaire which evaluates both cognitive and physical functions together. Reliability and validity of the Turkish version of CPFQ is not studied yet. In this study, we aimed to analyze the validity and reliability of the Turkish version of CPFQ in patients with fibromyalgia syndrome (FM) by translating and culturally adapting the CPFQ to Turkish. Patients and Methods: 117 patients over the age of 18, who applied to Ondokuz Mayıs University Faculty of Medicine, Department of Physical Medicine and Rehabilitation and were diagnosed with FM according to ACR-2016 FM diagnostic criteria, and gave written consent to participate in the study, were included in the study on a voluntary basis. CPFQ was translated into Turkish to adapt the questionnaire to Turkish. The intelligibility of the obtained Turkish version was evaluated by 5 patients and 5 healthcare professionals, and the final form of the questionnaire was prepared. Mini Mental State Examination (MMSE), Fibromyalgia Impact Questionnaire (FIQ), and Hospital Anxiety and Depression Scale (HADS), which were proven to be reliable and valid in Turkish, were administered to the patients. For test-retest reliability, the Turkish version of the CPFQ was filled in 2 times with an interval of 1 week. Internal consistency was evaluated by calculating Cronbach's alpha. Validity was evaluated by looking at the correlations between the total score obtained from the Turkish version of CPFQ and the MMSE score, HADS depression and anxiety scores, and FIQ score. Results: In the evaluation of internal consistency, Cronbach's alpha was found to be high in all subgroups. In test-retest reliability, intraclass correlation coefficient was high in CPFQ subgroups. CPFQ showed a significant positive correlation with HADS depression and moderately positive correlation with HADS anxiety and FIQ. A significant but weak, negative correlation was detected between CPFQ and MMSE. While there was no significant correlation between MMSE and FM disease activity and HADS anxiety, there was a significant but weak, negative correlation between HADS depression. Conclusion: In this study, the Turkish version of CPFQ was shown to have high reliability and validity in FM patients. It was concluded that CPFQ could be applied to Turkish patients with FM.