Condition category
Mental and Behavioural Disorders
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status
No longer recruiting

Plain English Summary

Background and study aims
Chronotherapy (including light therapy) helps adults suffering from depression to get better. This initial study investigates the possible effects of chronotherapy on mood, attention and sleep in children and adolescents.

Who can participate?
You can be included when you are an inpatient between the age of 12 and 18 with a moderate to severe depression and you do not get any medication (antidepressants, neuroleptics or beta-blocker).

What does the study involve?
You will receive morning light therapy for 14 consecutive days, each day for 45 minutes at an individually determined time point that fits your biological sleep rhythm (whether you are a morning, evening or in-between type)
Two groups are compared: you either receive “active” light therapy with 10.000 Lux or “inactive” light therapy with 100 Lux
Psychological and physiological tests are made before and after the intervention and again after a few weeks to investigate changes of your depression, sleep rhythm and other parameters

What are the possible benefits and risks of participating?
Benefits of chronotherapy include symptom amelioration, additional therapeutic offer for inpatients, possibility of a treatment without medication, high predictability of the mechanisms of action.
Possible risks of chronotherapy include headache, nausea, irritability, burning eyes, unexpected awakening during the night.

Where is the study run from?
The study takes place in the LWL-University Hospital Hamm in Germany

When is the study starting and how long is it expected to run for?
The study started in August 2011 and will last until August 2014.

Who is funding the study?
Funded by the study investigator.

Who is the main contact?
Prof. Martin Holtmann

Trial website

Contact information



Primary contact

Prof Martin Holtmann


Contact details

LWL University Hospital Hamm of the Ruhr- Universität Bochum
Clinic of Child and Adolescent Psychiatry
Psychotherapy and Psychosomatic Medicine
Heithofer Allee 64

Additional identifiers

EudraCT number number

Protocol/serial number


Study information

Scientific title

Chronotherapy in children and adolescents with depression and affective dysregulation: a double-blind randomized controlled trial


Study hypothesis

In adults, chronotherapy has been established as an adjunctive treatment for major depression, not only for seasonal affective disorder. Preliminary results indicate that chronotherapy (light therapy, sleep deprivation, sleep phase advance) might also be helpful more generally for disorders with a disturbed circadian rhythm, such as for attention defecit hyperactivity disorder (ADHD) and affective dysregulation. Up to date, the efficacy of chronotherapy for children and adolescents has not been investigated before. The primary objective in a first pilot trial is to investigate the effects of light therapy on depression and affective dysregulation in children and adolescents.

Ethics approval

Ethics Committee of the Department of Medicine, Ruhr University Bochum approved on 27th June 2011 (ref: 3996-11)

Study design

Double-blind randomized controlled parallel-group trial

Primary study design


Secondary study design

Randomised controlled trial

Trial setting


Trial type


Patient information sheet

Not available in web format, please use the contact details below to request a patient information sheet


Juvenile depression and affective dysregulation


Patients will be randomly assigned to the following two groups (1:1).

Experimental group
45 min morning light therapy (10.000 Lux, DAVITA LD 110) approx. 8.5 h after estimated melatonin-onset (DLMO, assessed by the morningness-eveningness-questionnaire (MEQ)) for 14 consecutive days. When there’s no improvement of depressive symptoms within the first 3 days of the intervention (assessed by the BDI II), the duration can be prolonged to 60 min to reach maximal effects.

Control group
45 min "inactive“ morning light therapy (approx. 100 Lux, DAVITA Luxor LED), approx. 8.5 h after estimated melatonin-onset (DLMO, assessed by the morningness-eveningness-questionnaire (MEQ)) for 14 consecutive days. A luxmeter (PCE-172) will ensure that the number of lux will be held constantly low.

After a "light therapy" pilot trial has been conducted, a combination trial with sleep deprivation (wake therapy), sleep phase advance and early morning light therapy will be realised.

Intervention type



Not Applicable

Drug names

Primary outcome measures

Change in depression rating scale at pre-test, post-test 1, post-test 2, post-test 3, post-test 4 and follow up (assessed by BDI II)

Secondary outcome measures

The following will be assessed at pre-test, post-test 1, and follow-up:
1. Clinical Global Impressions - Severity (CGI-S) Scale (at pre-test) and Clinical Global Impressions - Improvement (CGI-I) Scale (at post-test 1 and follow-up)
2. Sleep parameters (Schlaffragebogen B; Görtelmeyer, 2011)
3. Number of responder [ Clinical Global Impression- Improvement (CGI-I) from 1 to 2 / 25% improvement on BDI II)
4. Strengths and Difficulties Questionnaire – parent- and self-rating (SDQ; Goodman et al., 1997)
5. Parameters of attention: alertness, flexibility, Go-No / Go, divided attention (Zimmermann & Fimm, 2009)
6. Dim Light Melantonin Onset (DLMO) and cortisol – saliva-melatonin and saliva-cortisol
7. Therapy expectancy
8. Assessment of the individual chronotype (Horne-Ostberg-Morningness-Eveningness-Questionnaire, MEQ – german version; D-MEQ; Griefahn et al., 2001)
9. Child Behaviour Checklist (CBCL) / 4-18
10. Assessment of adverse events

Overall trial start date


Overall trial end date


Reason abandoned


Participant inclusion criteria

1. Moderate to severe depression [assessed by the Beck Depression Inventory (BDI) II]
2. 12-18 years of age
3. Ability of a patient to understand character and individual consequences of such a clinical trial
4. Written informed consent of the person with primary custody must be available before enrolment in the trial

Participant type


Age group




Target number of participants

30. 16/01/2014: number is 60.

Participant exclusion criteria

1. Acute suicidality
2. Pregnancy or lactation
3. Treatment with antidepressants
4. Treatment with beta-blocker
5. Bipolar 1 Disorder, schizophrenia
6. Diseases of the eye with involvement of the retina
7. Highly potent neuroleptics

Recruitment start date


Recruitment end date



Countries of recruitment


Trial participating centre

LWL University Hospital Hamm of the Ruhr- Universität Bochum

Sponsor information


Ruhr University Bochum (Germany)

Sponsor details

Department of Child and Adolescent
Psychiatry and Psychotherapy
Postbox 102148

Sponsor type




Funder type


Funder name

Investigator initiated and funded (Germany)

Alternative name(s)

Funding Body Type

Funding Body Subtype


Results and Publications

Publication and dissemination plan

Not provided at time of registration

Intention to publish date

Participant level data

Not provided at time of registration

Results - basic reporting

Publication summary

1. 2013 protocol in

Publication citations

  1. Protocol

    Bogen S, Legenbauer T, Bogen T, Gest S, Jensch T, Schneider S, Holtmann M, Morning light therapy for juvenile depression and severe mood dysregulation: study protocol for a randomized controlled trial., Trials, 2014, 15, 1, 178, doi: 10.1186/1745-6215-14-178.

Additional files

Editorial Notes