The present study aimed to evaluate the psychometric properties of a Persian version of the Psychological Flexibility Epilepsy Questionnaire (P-PFEQ). Transcultural adaptation and validation of the Persian version of the PFEQ were performed using translation and back-translation with pilot testing (on 17 patients) and expert evaluation. Participants in the current study involved 100 patients with an EEG-verified epilepsy diagnosis and an average age of 30.96 years (SD ± 6.46) (63% were female). Data collection included a sociodemographic questionnaire, epilepsy-specific questionnaire, the Depression-Anxiety-stress scale (DASS-21), the Insomnia Severity Index (ISI), the 31-item Quality-of-Life questionnaire in Epilepsy (QOLIE-31), the Acceptance and Action Questionnaire (AAQ), the Committed Action Questionnaire (CAQ), and the short form of the Freiburg Mindfulness Inventory (FMI). Descriptive and inferential analyses were conducted by SPSS software V.26. The P-PFEQ demonstrated semantic, conceptual, and content validity in equivalence with the Swedish version. Based on Exploratory Factor Analysis (EFA), five items were eliminated and unidimensional scale of PFEQ with 12 items, explaining 50.38% of the total variance, was accepted. The scale showed good reliability through internal consistency (Cronbach's α of 0.9) and temporal stability on retest (n = 85, Intraclass correlation = 0.92). Convergent and divergent validity findings were acceptable for the P-PFEQ. The findings show that the P-PFEQ is a reliable and valid scale for assessing psychological flexibility in the Iranian patients with epilepsy. Also, it can be confidently recommended as a useful instrument in clinical practice.
Keywords: Epilepsy; Psychological flexibility; Psychometric properties; Reliability; Validity.
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