<![CDATA[Background: Adolescence is characterized by significant physical, cognitive, emotional, and social changes that influence learning behavior, lifestyle patterns, and nutritional intake. Boarding schools generally implement highly structured daily routines, including regulated mealtimes, study periods, sleep schedules, and extracurricular activities, whereas non-boarding schools allow greater flexibility in students’ daily lives. Objectives: This study aimed to examine differences in nutritional status, breakfast habits, sleep quality, and learning concentration among adolescents attending boarding and non-boarding senior high schools in Depok, Indonesia, in 2025. Methods: A cross-sectional study design was employed using stratified random sampling. A total of 110 students participated, consisting of 55 students from Madrasah Aliyah Al Hidayah Boarding School Rawadenok Depok and 55 students from SMAN 5 Depok, drawn from grades 10 and 11. Data were analyzed using the Mann–Whitney U test and the independent t-test. Results: The findings demonstrated significant differences in nutritional status (p-value=0.016) and breakfast habits (p-value<0.001) between students residing in dormitories and those living at home. However, no statistically significant differences were observed in sleep quality (p-value=0.560) or learning concentration (p-value=0.993) between the two groups. Conclusions: Adolescents attending boarding and non-boarding schools differed with respect to nutritional status and breakfast habits, while sleep quality and learning concentration showed no significant differences. These results highlight the importance of maintaining balanced nutrition and healthy lifestyle practices to support adolescents’ overall health and academic performance. ]]>
