Psychometric Properties of the Turkish Version of the Fluid Intake Appraisal Inventory in Adults Receiving Hemodialysis

Abstract

Introduction: Effective self-management of fluid intake in hemodialysis relies on self-efficacy. Although regular assessments with valid tools are crucial, no suitable measurement exists for the Turkish population. This study evaluates the reliability, validity, and interpretability of the Turkish version of the Fluid Intake Appraisal Inventory. Methods: This cross-sectional study collected data from December 2021 to November 2022. It analyzed reliability, validity, and interpretability. Results: The 202 adults receiving hemodialysis were evaluated. The scale showed high internal consistency with Cronbach α = 0.954 and good test–retest reliability with intraclass correlation coefficients = 0.975, 95% confidence interval: 0.786–0.992, and no measurement error. It demonstrated excellent content validity with scale level content validity index ≥0.90 and good construct validity with a negative moderate correlation to interdialytic weight gain. For structural validity, the model fit indices were χ2/df = 5.7, root mean square error of approximation = 0.15, goodness of fit indexes = 0.58, Tucker-Lewis Index = 0.57, comparative fit index = 0.6, and standardized root mean square residual = 0.10. Conclusion: This inventory is a valid and reliable tool for assessing self-efficacy in fluid intake among the Turkish hemodialysis population. © 2025 International Society for Apheresis and Japanese Society for Apheresis.