TicZ-Study: The effect of a two-week morning light therapy (Bright Light Therapy, BLT) on children and adolescents with tic and obsessive-compulsive disorders

TicZ-Study: The effect of a two-week morning light therapy (Bright Light Therapy, BLT) on children and adolescents with tic and obsessive-compulsive disorders - TicZ-Study

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00038620

Enrollment

Registered

2025-12-02

Start date

2026-02-18

Completion date

Unknown

Last updated

2026-03-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Children and adolescents aged 12-17

Interventions

Group 1: Treatment group First, parents/caregivers of the children and adolescents participating the study are given a questionnaire to identify any contraindications for BLT. The questionnaire also

Eligibility

Sex/Gender

All

Age

12 Years to 17 Years

Inclusion criteria

Inclusion criteria: Tic or obsessive-compulsive disorders or a combination of both disorders

Exclusion criteria

Exclusion criteria: No tic or obsessive-compulsive disorder Eye diseases such as glaucoma or cataracts, diseases of the retina as well as the skin disease lupus If taking antibiotics, participation must be postponed or paused

Design outcomes

Primary

Measure	Time frame
This study wants to determine the extent to which two weeks of morning light therapy (Bright Light Therapy, BLT) can lead to a reduction in neuropsychiatric symptoms and an improvement in sleep quality and general psychological well-being in children and adolescents with tic and/or obsessive-compulsive disorders. For this, various self-assessment questionnaires are used before and after a two-week course of light therapy. These include the “Selbstbeurteilungsbogen zur Erfassung von Tic- Störungen SBB- TIC“ of the „Diagnostik-System für psychische Störungen nach ICD-10 und DSM-V für Kinder und Jugendliche-III, DISYPS-III“ (Döpfner und Görtz-Dorten, 2017), the „ZWIK-S“ of the „Diagnostikum für Zwangsstörungen im Kindes- und Jugendalter, DZ-KJ“ (Goletz, Adam und Döpfner, 2020), the self-assessment questionnaires of the „Schlafinventar für Kinder und Jugendliche, SI-KJ“ (Lehmkuhl et al., 2015) and the „Inventar zur Erfassung der Lebensqualität bei Kindern und Jugendlichen, ILK“ (Mattejat und Remschmidt, 2011). A follow-up will be conducted for the intervention group after a further 14 days.	—

Measure

Time frame

This study wants to determine the extent to which two weeks of morning light therapy (Bright Light Therapy, BLT) can lead to a reduction in neuropsychiatric symptoms and an improvement in sleep quality and general psychological well-being in children and adolescents with tic and/or obsessive-compulsive disorders. For this, various self-assessment questionnaires are used before and after a two-week course of light therapy. These include the “Selbstbeurteilungsbogen zur Erfassung von Tic- Störungen SBB- TIC“ of the „Diagnostik-System für psychische Störungen nach ICD-10 und DSM-V für Kinder und Jugendliche-III, DISYPS-III“ (Döpfner und Görtz-Dorten, 2017), the „ZWIK-S“ of the „Diagnostikum für Zwangsstörungen im Kindes- und Jugendalter, DZ-KJ“ (Goletz, Adam und Döpfner, 2020), the self-assessment questionnaires of the „Schlafinventar für Kinder und Jugendliche, SI-KJ“ (Lehmkuhl et al., 2015) and the „Inventar zur Erfassung der Lebensqualität bei Kindern und Jugendlichen, ILK“ (Mattejat und Remschmidt, 2011). A follow-up will be conducted for the intervention group after a further 14 days.

—

Countries

Germany

Contacts

Public ContactStephan Bongard

Institut für Psychologie, Goethe-Universität Frankfurt

bongard@psych.uni-frankfurt.de+49(0)6979835321

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Apr 4, 2026