<![CDATA[Introduction: Anxiety and insomnia were common health concerns among adolescents and could affect concentration, emotional regulation, learning readiness, and daily functioning. Vocational high school students might have been particularly vulnerable because they faced both academic demands and competency-based practical training. Method: This analytic cross-sectional study was conducted in September 2022 at a public vocational high school in East Java, Indonesia. A total of 162 grade XII students were selected using stratified random sampling. The independent variable was anxiety level, which was measured using the Hamilton Anxiety Rating Scale, while the dependent variable was insomnia severity, which was assessed using the KSPBJ Insomnia Rating Scale. Descriptive statistics and the Spearman rank correlation test were used for data analysis. Results: Most participants were aged 17 years (54.3%) and were male (52.5%). Moderate anxiety was reported by 107 students (66.0%), followed by mild anxiety in 42 students (25.9%) and no anxiety in 13 students (8.0%). Mild insomnia was reported by 114 students (70.4%), moderate insomnia by 46 students (28.4%), and no insomnia by 2 students (1.2%). Anxiety level was significantly associated with insomnia severity (r = 0.215; p = 0.006). Conclusions: Anxiety level was significantly and positively associated with insomnia severity among vocational high school students, although the strength of the relationship was weak. This finding indicated that students with higher anxiety levels tended to report greater insomnia severity, suggesting that anxiety and sleep problems might have represented interconnected student health concerns that warranted attention in school-based health assessments.]]>
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