Abstract

The current study examined whether baseline demographic and clinical characteristics moderate the effectiveness of the Transdiagnostic Sleep and Circadian (TSC) intervention in improving adolescent circadian sleep health. Using an integrative data analysis approach, data from three independent adolescent samples (N = 134; ages 10-18) were pooled to evaluate changes across multidimensional sleep outcomes defined by the RU-SATED model of sleep, including regularity, satisfaction, alertness, timing, efficiency, and duration. Linear mixed-effects models were used to assess pre-to-post intervention changes and test moderation by age, sex, family income, and clinical status. Results indicated significant improvements in sleep satisfaction following TSC, with greater gains observed among older adolescents and those with a current mental health diagnosis. Age also moderated changes in weekend sleep timing, with older adolescents demonstrating greater shifts toward earlier sleep midpoints. Income moderated changes in weekend sleep duration, with higher-income participants showing slight decreases over time. No consistent moderation effects were observed for sex, and most sleep outcomes did not significantly change over time. Overall, findings suggest that TSC is broadly effective across diverse adolescent populations, with certain individual characteristics influencing specific domains of treatment response. These results support the transdiagnostic applicability of TSC while highlighting the importance of considering developmental and contextual factors in optimizing intervention outcomes.

Degree

MS

College and Department

Family, Home, and Social Sciences; Psychology

Rights

https://lib.byu.edu/about/copyright/

Date Submitted

2026-05-19

Document Type

Thesis

Keywords

adolescent sleep health, circadian rhythms, moderator analysis, sleep intervention, socioeconomic status, mental health, treatment effectiveness

Language

english

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