Anxiety is a psychological issue that adolescents may experience, and that can potentially affect sleep quality. Suboptimal sleep quality among students can affect their ability to concentrate in class, academic readiness, and physical and psychological health. This study aims to examine the relationship between anxiety levels and sleep quality among 11th-grade students at SMAN 1 Ubud. This study employed a quantitative design using a descriptive-correlational approach and a cross-sectional design. The study population consisted of 11th-grade students at SMAN 1 Ubud, and the sample was selected according to the study criteria. The study variables included anxiety levels as the independent variable and sleep quality as the dependent variable. Data were collected using the Zung Self-Rating Anxiety Scale to measure anxiety levels and the Pittsburgh Sleep Quality Index to measure sleep quality. Data analysis was conducted using descriptive analysis and Spearman's rank correlation test. The study's results indicate that most students have normal anxiety levels and good sleep quality. The main findings indicate a relationship between anxiety levels and sleep quality among students. This study concludes that anxiety levels are associated with students' sleep quality; therefore, efforts to detect anxiety early and promote healthy sleep should be prioritized in the context of school health.
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