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Effects of blue-depleted indoor lighting on hospital ward employees

Effects of blue-depleted indoor lighting during evening and night shifts on psychiatric hospital ward employees

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN21603406
Enrollment
106
Registered
2018-12-28
Start date
2018-11-12
Completion date
Unknown
Last updated
2022-08-29

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

Conditions

Sleep and health of shift working nurses at a psychiatric ward at various light conditions at work Not Applicable

Interventions

The intervention that will be tested in this study is altered light conditions during evening and night shifts for nursing staff at a psychiatric ward at St. Olavs Hospital, Østmarka in Norway. This p

Sponsors

Norwegian University of Science and Technology
Lead Sponsor
Department of Health Promotion, Norwegian Institute of Public Health
Collaborator

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: All nursing staff currently working at the acute ward at St Olavs Hospital, Østmarka (>= 40% of full time equivalent) will be invited to participate

Exclusion criteria

Exclusion criteria: 1. Not working at the acute ward at St Olavs Hospital, Østmarka in Norway 2. Having less than 40% of full time equivalent position at the acute ward at St Olavs Hospital

Design outcomes

Primary

MeasureTime frame
Measured after 3 weeks of work in the respective light conditions: 1. The nurses' effort, concentration, and estimated performance at work assessed using three items based on the Psychological Variables Questionnaire (Pilcher & Walters, 1997) 2. Nurses' subjective evaluation of the lighting conditions assessed using eight semantic differential adjective items rated on a 7-point scale (Smolders & de Kort, 2014) 3. Symptoms of eye strain assessed using the Headache and Eye Strain Scale (H&ES) 4. Headache related to the altered light conditions assessed with eight self-reported items (Viola, James, Schlangen, & Dijk, 2008) 5. The nurses’ psychological distress assessed using the Kessler Psychological Distress Scale (K10) (Kessler et al., 2003) 6. The nurse’s physical health assessed using the Physical Health Questionnaire (PHQ)(Schat, Kelloway, & Desmarais, 2005)

Secondary

MeasureTime frame
1. Self-report measures of work and sleep schedules derived from a work- and sleep diary that the nurses will be instructed to keep during the last 2/3 weeks of each light condition. The work diary provides information on the day-to-day shift schedule of the nurses (shift start and end times), level of sleepiness during each shift, and work-related incidents (accidents/near-accidents). The sleep diary provides daily estimates of the nurses sleep episodes, including sleep onset latency, wake after sleep onset, total sleep time, etc. 2. Motor activity in the day and sleep at night measured objectively for 80 nurses with an actigraphy device for the last 2/3 weeks in each light condition. Nighttime data from the actigraph will be used in parallel with the sleep diary for a more accurate assessment of the participants sleep.

Countries

Norway

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Mar 2, 2026