NCT06973759

Adjunctive Bright Light Therapy in Adolescents With Depression and Eveningness

Bright Light Therapy for Adolescents With Depression and Eveningness - a Randomized, Placebo-controlled, Assessor-blinded Study

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 90 (estimated)
• Sponsor: Chinese University of Hong Kong · Academic / Other
• Sex: All
• Age: 12 Years – 19 Years
• Healthy volunteers: Not accepted

Summary

This study examines the efficacy of bright light therapy as a treatment for adolescents diagnosed with unipolar non-seasonal depression who exhibit an evening chronotype.

Detailed description

This randomized, placebo-controlled, assessor-blinded trial aims to evaluate the efficacy of bright light therapy (BLT) as a treatment for adolescents with depression and evening chronotype. Eligible participants will be randomized to receive either BLT or dim red light (placebo) daily for 8 weeks. Depression severity, sleep parameters, and circadian markers will be assessed at baseline, during treatment, post-treatment, and at follow-up visits.

Conditions

• Depression, Unipolar

Interventions

Type	Name	Description
DEVICE	Bright light therapy	Exposure to blue-enriched white light for 15-30 minutes a day for 8 weeks
DEVICE	Dim red light	Exposure to dim red light for 15-30 minutes a day for 8 weeks.

Timeline

• Start date: 2025-11-01
• Primary completion: 2028-06-30
• Completion: 2028-06-30
• First posted: 2025-05-15
• Last updated: 2026-03-19

Locations

1 site across 1 country: Hong Kong