Validity and Reliability of the Turkish Version of Mandibular Function Impairment Questionnaire

Yıldız N. T. , ALKAN A. , Külünkoğlu B. A.

Cranio - Journal of Craniomandibular Practice, 2021 (Journal Indexed in SCI Expanded) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2021
  • Doi Number: 10.1080/08869634.2021.2004715
  • Title of Journal : Cranio - Journal of Craniomandibular Practice
  • Keywords: mandibular function impairment questionnaire, pain, reliability, severity, Temporomandibular disorders, validity


© 2021 Taylor & Francis Group, LLC.Objective: To assess the validity and reliability of the Turkish version of the Mandibular Function Impairment Questionnaire (MFIQ-TR). Methods: Included in this study were 248 patients diagnosed with temporomandibular disorder (TMD) according to Diagnostic Criteria for TMD Axis I protocol. Construct-related validity was evaluated through internal and external construct validity; convergent and divergent validities were evaluated by the average variance extracted (AVE), composite reliability (CR), and bivariate correlations between factors. Reliability was assessed by internal consistency and test-retest reliability. Results: All items of the MFIQ-TR had content validity and factor loadings above 0.5. The model statistics indicated a good fit. The convergent validity was very good (AVE > 0.5 and CR > 0.7), and the discriminant validity was satisfied. Internal consistency and test-retest reliability of the MFIQ-TR were excellent. Conclusion: The MFIQ-TR is a valid and reliable instrument for evaluating the impairment of mandibular function in Turkish patients with TMD.