The “İllness Intrusiveness Ratings Scale (IIRS)” is a useful, easy-to-apply tool that measures the degree of illness-induced disruptions in the 13 different aspects of life. The main aim of this study is to examine the validity and reliability of the Turkish version of IIRS and provide a new tool to investigate the impact of chronic illnesses in the Turkish population. A total of 376 patients with hypertension, diabetes, and/or osteoarthritis were recruited in this study. Patients completed the survey that consisted of the sociodemographic data, the Turkish translation of the IIRS, and the World Health Organization Quality of Life-Brief Form. The exploratory factor analysis yielded a three-factor structure, “instrumental,” “intimacy,” and “relationship and personal development,” which accounted for 59.9% of the total variance. Confirmatory factor analysis verified the three-factor structure. The IIRS was inversely correlated with the physical, psychological, and social health domains of quality of life. Our findings corroborate the reliability and validity of the Turkish version of the Illness Intrusiveness Ratings Scale. It can be used by healthcare practitioners to measure the illness-induced disruptions of lifestyles, activities, and interests.
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