This is a randomized placebo-controlled trial to examine the efficacy of six-week bright light therapy as adjunctive treatment for patient with bipolar depression and eveningness.
Source : Importé depuis le centre
This randomized placebo-controlled trial aims to evaluate the efficacy of adjunctive BLT in addition to their maintenance treatment in reducing depressive symptoms. The second aim of the study is to explore the effects of BLT on sleep-wake changes and the sleep disturbances.
Method: Each eligible participant will be randomized to either i) bright light therapy (BLT) or ii) inactive negative ion generator (placebo) treatment for 30-minutes daily at the midday for a total of six weeks. Participants will be evaluated at baseline, 2nd, 4th and 6th week for depression and insomnia symptoms. Actigraphy will be done at baseline and in the last week of treatment.
Source : Importé depuis le centre
RECRUTEMENT
Profil des participants
Limites d'âge
minimum : 18 ans
maximum : 65 ans
Sexe(s) des participants
ALL
Source : Importé depuis le centre
Condition médicale (spécialité visée)
Domaine de recherche
Donnée non disponible
Critères de sélection
Cohortes
Nom
Condition médicale
Traitement
État du recrutement
Bright light therapy group
10,000lux bright light
Donnée non disponible
Inconnu
Placebo group
inactive negative ion generator
Donnée non disponible
Inconnu
Bright light therapy group
État du recrutement
unknown
10,000lux bright light
Placebo group
État du recrutement
unknown
inactive negative ion generator
Données à jour depuis :
4 mars 2026
SITES ET CONTACTS
Centre principal
the chinese university of hong kong
HONG KONG, HONG KONG
Recrutement local
—
FERMÉ
Dernière modification :
4 mars 2026
Données à jour depuis :
6 mars
Origine des données :
clinicaltrials.gov
1. Aged 18-65 years.
2. Is capable to give informed consent.
3. Meeting the diagnostic criteria of bipolar depression (including both bipolar I and II disorders) by the Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders, 5th edition (DSM-V), Disorders (SCID-V).
4. a score 20 or above representing current moderate or severe episode of major depression and a score of at least 1 on items H1 or H2 on the Structured Interview Guide for the Hamilton Depression Rating Scale with Atypical Depression Supplement (SIGH-ADS), corresponding to at least moderate severity.
5. A score of 41 or less by the Morningness-Eveningness Questionnaire which represents eveningness.
6. On a stable dose of antimanic treatment for bipolar disorder for at least four weeks.
Exclusion Criteria:
1. Major Depressive Disorder fulfilling the Seasonal Pattern Specifier of the DSM-V (Seasonal Affective Disorder).
2. A past history of rapid-cycling within the past twelve months or a Young Mania Rating Scale more than 12 at screening
3. A current or past history of schizophrenia, mental retardation, organic mental disorder; or current substance use disorder.
4. Presence of psychotic symptoms or substantial suicidal risk as judged by the clinician and/or screening instruments.
5. Presence of contraindications to bright light therapy: for example, history of light induced migraine/ epilepsy; current use of photosensitizing medications such as St. John's wart; presence of eye disease: e.g. retinal blindness, severe cataract, glaucoma, and photosensitive skin condition e.g. systemic lupus erythematosus
6. Significant medical condition/ hearing impairment/ speech deficit leading to incapability of completing clinical interview.
7. Regular shift-workers or trans-meridian flight in the past 3 months or during study
8. Enrolment in another clinical trial of an investigational medicinal product or device.
9. Receiving regular psychotherapy.
Source : Importé depuis le centre
Cohortes
Thérapie ou Intervention proposée
Cohortes
Nom
Condition médicale
Traitement
État du recrutement
Bright light therapy group
10,000lux bright light
Donnée non disponible
Inconnu
Placebo group
inactive negative ion generator
Donnée non disponible
Inconnu
Bright light therapy group
État du recrutement
unknown
10,000lux bright light
Placebo group
État du recrutement
unknown
inactive negative ion generator
Données à jour depuis :
4 mars 2026
Description de l'étude
Description de l'étude
Résumé de l'étude
This is a randomized placebo-controlled trial to examine the efficacy of six-week bright light therapy as adjunctive treatment for patient with bipolar depression and eveningness.
Source : Importé depuis le centre
This randomized placebo-controlled trial aims to evaluate the efficacy of adjunctive BLT in addition to their maintenance treatment in reducing depressive symptoms. The second aim of the study is to explore the effects of BLT on sleep-wake changes and the sleep disturbances.
Method: Each eligible participant will be randomized to either i) bright light therapy (BLT) or ii) inactive negative ion generator (placebo) treatment for 30-minutes daily at the midday for a total of six weeks. Participants will be evaluated at baseline, 2nd, 4th and 6th week for depression and insomnia symptoms. Actigraphy will be done at baseline and in the last week of treatment.
Source : Importé depuis le centre
Centres participants
Sites
Centres participants
1
centres
THE CHINESE UNIVERSITY OF HONG KONG
Hong kong
HONG KONG
Recrutement local
État du recrutement:
FERMÉ
Source d'information
Dernière modification :
4 mars 2026
Données à jour depuis :
6 mars
Origine des données :
clinicaltrials.gov