Daylight-controlled Lighting Adjusted for Geographical Orientation : Effects on Recovery, Energy Consumption and User Satisfaction

NCT05868291 | Active Not Recruiting

• 1 other identifier: DIM Light
• Study Type: observational
• Target: 900
• Locations: 1 country
• Sites: 2

Brief Summary

The trial takes place in 4 psychiatric closed wards at Ny Psykiatri Bispebjerg. The objective is to compare, retrospectively, over two consecutive winter periods (2022 and 2023) the effect of the lighting on the duration of stay of the patients. During the first winter, a standard lighting is used, and, during the second winter, the lighting will be modified to favor a greater light intensity in blue wave color light in the morning and a gradual decrease in light intensity in the evening adjusted for geographical orientation of the patients' rooms.

Conditions

Light

Keywords

DIM Light; Sleep; Energy Consumption; Chronotherapeutics; Built environment

Outcome Measures

Primary Outcomes (1)

• Duration of stay

  Number of day of the stay of the partient in the closed ward of NPB (Ny Psykiatri Bispebjerg)

  The 2 periods consecutive winter period (2022 and 2023)

Secondary Outcomes (1)

• Use of psychotropic medication

  The 2 periods consecutive winter period (2022 and 2023)

Study Arms (2)

Group 1

During the period going from November 2022 to March 2023, data from all the patients (approx. 500) hospitalized in the 4 closed wards will be collected (duration of stay, medication use...). The group 1 will be exposed to the standard lighting system in Bispebjerg Hospital.

Group 2

During the period going from November 2023 to March 2024, data from all the patients (approx. 500) hospitalized in the 4 closed wards will be collected (duration of stay, medication use...). The group 2 will be exposed to the new lighting system that will have been optimized (higher intensity and blue content in the morning and progressively dimmed light after 14:00).

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Patients above 18 years old that have been hospitalized in one of the 4 closed wards of NPB during the 2 study periods.

You may qualify if:

• patients being 18 years old or older
• patients having a duration of stay of at least 3 days in the wards

You may not qualify if:

• patients that have switched room during their stay
• patients that have been in rooms where the lighting wasn't working

Sponsors & Collaborators

• Mental Health Centre Copenhagen, Bispebjerg and Frederiksberg Hospital: lead
• Elforsk: collaborator

Study Sites (2)

Ny Psykiatri Bispebjerg

Copenhagen, Region Sjælland, 2400, Denmark

Location

Mental Health Centre Copenhagen

Copenhagen, 2100, Denmark

Location

Related Publications (1)

• Volf C, Corell DD, Hansen TS, Dubois JM, Zeng X, Baandrup L, Petersen PM, Martiny K. Effects of dim-evening lighting optimised for geographical orientation versus standard lighting on mental health: protocol paper for a quasiexperimental study in a psychiatric hospital. BMJ Open. 2024 Oct 10;14(10):e086658. doi: 10.1136/bmjopen-2024-086658.

  PMID: 39389598 DERIVED

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: RETROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: May 11, 2023
• First Posted: May 22, 2023
• Study Start: November 21, 2022
• Primary Completion: April 1, 2026
• Study Completion: April 1, 2026
• Last Updated: May 11, 2025

Record last verified: 2025-05

Locations

DK (2)