Further Validity and Reliability of Turkish Version of the Mandibular Functional Impairment Questionnaire in Patients with Temporomandibular Dysfunction

Purpose: 
 The aim of this study is to develop a new Turkish version MFIQ (MFIQ-T-N) by adding the cut off value and improving validation Mandibular Functional Impairment Questionnaire (MFIQ-T) in patinets with Temporomandibular dysfunction.
 Methods: psychometric properties were examined 242 participants diagnosed TMD 81 healthy participants. internal construct validity was assessed both exploratory confirmatory factor analysis. External MFIQ-Tr-N established Fonseca Anamnestic index (FAI), Oral Health Impact Profile-14 (OHIP-14), patient health questionnaire-9 (PHQ-9). Predictive using receiver operating characteristic (ROC) validate cut-off MFIQ-T-N for diagnosis TMD. For determination reliability consistency, test-retest smallest real difference (SRD95) investigated. Results: Factor analysis indicated that had three factors as masticatory, non-masticatory 1, 2. moderately correlated FAI (Spearman’s rho = 0.553, p < .001) OHIP-14 (rho 0.534, .001). point set at >5 84% sensitivity 87% specificity. ICC Cronbach’s α values found 0.913 0. 916, respectively. SRD95 Test-retest 7.004. Conclusions: sufficient features appropriate use In addition, provides researchers greater opportunities evaluate mandibular functions group.