Turkish Validity and Reliability Study of the Cardiac Self-Efficacy Questionnaire

AIM: The aim of this study was to determine the validity and reliability of the “Cardiac Self-Efficacy Questionnaire” in Turkish. METHODS: This methodological research was conducted among 400 patients who were hospitalised at the Cardiology Clinic of Giresun University Training and Research Hospital between 25 March 2023 and 15 May 2024. The data were collected using the “Patient Introductory Form”, “Cardiac Self-Efficacy Questionnaire”, and “Chronic Diseases Self-Efficacy Scale”. RESULTS: The scale demonstrated excellent content validity, with a content validity index of 1.00. Construct validity was examined using factor analytic techniques. “The Kaiser–Meyer–Olkin measure indicated adequate sampling adequacy 0.878, and Bartlett’s test of sphericity was statistically significant (p < .001), confirming the appropriateness of the correlation matrix for factor analysis.” Exploratory factor analysis supported a two-factor solution control of symptoms and maintenance of functionality which collectively explained 53.55% of the total variance. The results indicated that the model provided a goodto- acceptable fit to the data, as evidenced by the following fit indices: χ2/df = 2.172, Goodness of Fit Index = 0.91, Adjusted Goodness Fit Index = 0.87, Comparative Fit Index = 0.95, Incremental Fit Index = 0.95, Tucker–Lewis Index = 0.93, Normed Fit İndex = 0.91, and Root Mean Square Error of Approximation = 0.07. The reliability analysis indicated acceptable internal consistency, with Cronbach’s α values of 0.88 for the overall scale, 0.86 for the symptom control subscale, and 0.76 for the functionality maintenance subscale. CONCLUSION: The Cardiac Self-Efficacy Questionnaire can be considered a valid and reliable instrument for assessing cardiac self-efficacy in the Turkish population. Cite this article as: Bayram, S., & G.k Uğur, H. (2026). Turkish validity and reliability study of the cardiac self-efficacy questionnaire. Florence Nightingale Journal of Nursing, 34, 0346, doi:10.5152/FNJN.2026.25346.