Efficacy of group-based CBT-I with adjunctive bright light therapy in youths with insomnia and eveningness: Results from a randomised controlled trial
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I presented our most recent randomised controlled trial on group-based CBT-I with and without bright light therapy for youths with insomnia and eveningness.
Both treatments significantly improved insomnia and mood, with effects sustained at six months. Adjunctive bright light therapy further advanced circadian timing, though differences between the two active treatments were not statistically significant. Mediation analyses showed that improvements in sleep partially explained the mood gains. Group-based CBT-I therefore looks effective for youth with insomnia and eveningness, and BLT may offer added circadian benefits — but pragmatic trials are needed to test real-world feasibility and cost-effectiveness.
