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Determining the effect of dim regulation by devices radiating according to natural circadian sunlight shifts

Effect of Radiance-Dimmer Devices Simulating Natural Sunlight Rhythm on the Plasma Melatonin Levels and Anxiety and Depression Scores of the Submarine Personnel

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
IRCT
Registry ID
IRCT20161112030846N2
Enrollment
52
Registered
2018-06-03
Start date
2016-01-21
Completion date
Unknown
Last updated
2018-07-16

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

Conditions

Anxiety and Depressive. Generalized anxiety disorder

Interventions

Intervention 1: experimental group, In order to lighting the environment, 4 automatic optic devices were installed at the halls where personnel from the case group were working in, containing lamps e

Sponsors

Bagheiat-allah University of Medical Sciences
Lead Sponsor

Eligibility

Sex/Gender
Male
Age
21 Years to 30 Years

Inclusion criteria

Inclusion criteria: Underground employees who use artificial light only during the period of their presence No specific disease or chronic physical and mental illness Male Have at least 21 and a maximum of 30 years

Exclusion criteria

Exclusion criteria: Taking medications that could affect serum melatonin levels including Having depression or any other major psychiatric disorders on DSM IV Having significant acute or chronic systemic disorders including type I diabetes mellitus, uncontrolled thyroid disorders, kidney/prostate/bladder problems which cause excessive urination, congestive heart failure, angina pectoris or other major cardiovascular disorders, hepatitis, asthma or severe respiratory allergies, stroke, Parkinson’s disease, Alzheimer’s disease, schizophrenia, epilepsy, oncologic disorders if less than 1 year since end of treatment, or chronic infections Use of hypnotics, melatonin, stimulants, or other medications that may affect melatonin levels (e.g. ß blockers, drugs that affect prostaglandin synthesis, or drugs that activate hepatic melatonin metabolism) and unwillingness or inability to discontinue the occasional use of these medications for at least 4 weeks before beginning of the study

Design outcomes

Primary

MeasureTime frame
Anxiety. Timepoint: 3 TIMES: Initiation, Middle and End of the study period. Method of measurement: Cattell’s Anxiety Scale Questionnaire (IPAT).;Depression. Timepoint: 3 TIMES: Initiation, Middle and End of the study period. Method of measurement: Minnesota Multiple Personality Inventory (MMPI).;Plasma melatonin hormone. Timepoint: 3 TIMES: Initiation, Middle and End of the study period. Method of measurement: Blood examination.

Countries

Iran (Islamic Republic of)

Contacts

Public ContactKhodabakhsh Ahmadi

Bagheiat-allah University of Medical Sciences

kh_ahmady@bmsu.ac.ir+98 21 8248 2712

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026