UYKU SAĞLIĞI OKURYAZARLIĞI ÖLÇEĞİNİN TÜRKÇE GEÇERLİK GÜVENİRLİK ÇALIŞMASI

Abstract

Şenocak M., Validity and Reliability Study of the Turkish Version of the Sleep Health Literacy Scale, Hacettepe University Faculty of Medicine Department of Family Medicine, Master's Thesis, Ankara, 2026. The aim of this study was to evaluate the Turkish validity and reliability of the Sleep Health Literacy Scale (SHLS) developed by Feldman and Slavish (2024). This methodological study included 364 individuals aged 18 years or older. The scale was adapted into Turkish using the forward–backward translation technique. Content validity was assessed through expert opinions from 10 specialists, and the content validity index (CVI) was calculated. Construct validity was evaluated using exploratory and confirmatory factor analyses (EFA, CFA). Internal consistency was assessed with Cronbach’s alpha, while test–retest reliability was evaluated 1–2 weeks apart in 40 participants. Relationships between sociodemographic variables and scale scores were analyzed using independent samples t-test, one-way analysis of variance (ANOVA), and Pearson correlation analysis. The mean age of 364 participants was 32.97±11.09 years, with 56.9% being female and 43.1% male. The content validity index exceeded 0.90 for all items. The Kaiser-Meyer-Olkin (KMO) sampling adequacy value was 0.892, and Bartlett's Test of Sphericity was significant (p<0.001). Exploratory factor analysis confirmed the two-factor structure of the original scale (Sleep Health Communication and Sleep Health Knowledge). Confirmatory factor analysis goodness-of-fit indices were within acceptable limits (RMSEA=0.063, CFI=0.902, TLI=0.895, GFI=0.802). Internal consistency analysis revealed Cronbach's alpha values of 0.884 for Factor 1, 0.648 for Factor 2, and 0.795 for the total scale. Test-retest reliability analysis showed no significant differences in scores for both factors (p>0.05). Weak positive correlations were found between age and scale subscales. Education level, willingness to learn new information about sleep, and level of knowing whom to consult significantly affected scale scores. The Turkish version of the Sleep Health Literacy Scale is a valid and reliable tool for assessing sleep health literacy in the Turkish-speaking adult population. The scale can be used to evaluate individuals' knowledge of sleep health and their ability to navigate the healthcare system. Determining sleep health literacy will help identify at-risk groups and plan interventions to improve sleep health. Future research should test the scale in different populations and examine its relationship with sleep quality.