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CC BY-NC-ND 4.0 · Sleep Sci 2020; 13(02): 145-151
DOI: 10.5935/1984-0063.20190137
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The effectiveness of bright light exposure in shift-worker nurses: A systematic review and meta-analysis

Seyedeh Zahra Aemmi
1   Ahvaz Jundishapur University of Medical Sciences, Nursing Care Research Center in Chronic Diseases, School of Nursing and Midwifery - Ahvaz - khozestan - Iran.
,
Eesa Mohammadi
2   Tarbiat Modares University, Department of Nursing, Faculty of Medical Sciences - Tehran - Iran.
,
Hamid Heidarian-Miri
3   Mashhad University of Medical Sciences, Social Determinants of Health Research Center - Mashhad - khorasan Razavi - Iran.
,
Malek Fereidooni-Moghadam
4   Isfahan University of Medical Sciences, Nursing and Midwifery Care Research Center, School of Nursing and Midwifery - Isfahan - Iran
,
Hatam Boostani
5   Ahvaz Jundishapur University of Medical Sciences, Department of Psychiatry, School of Medicine - Ahvaz - khozestan - Iran.
,
Kourosh Zarea
1   Ahvaz Jundishapur University of Medical Sciences, Nursing Care Research Center in Chronic Diseases, School of Nursing and Midwifery - Ahvaz - khozestan - Iran.
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ABSTRACT

Bright light exposure is as one of the non-pharmacological measures to sleep management in shift-worker. This study was conducted to determine the effectiveness of bright light exposure in shift-worker nurses. We performed a systematic review and meta-analysis according to the preferred reporting items for systematic reviews and meta-analyses (PRISMA) statement and using existing literature in the following databases: Cochrane Library, Embase, PubMed, Scopus, Web of Science, to examine any eligible and relevant interventional (randomized controlled trial, experimental and quasi-experimental studies) which were published by December 31, 2018. The obtained documents were analyzed using Stata 14.1 and Cochrane Collaboration’s RevMan 5.3. Five studies met eligibility criteria. Results from fixed-effect meta-analysis of the included studies revealed that the exposure could decrease the sleepiness levels, complaints related to shift-work, insomnia and increased the psychomotor error (95% confidence interval (CI): -0.87,-0.43, p=0.000, I2=98.6%), alertness and daytime sleep duration following night shifts (95% CI: 0.08,0.99, p=0.000, I2=92.7%). However, in the random effects model, none of them were statistically significant. Although the results of fixed-effect are in favor of beneficial effects of bright light exposure in shift-worker nurses, the random effects could not approve these findings. Maybe because of either large heterogeneity or insufficiency of the number of studies. Besides, because of the low number of studies, it was impossible to deal with high amount of heterogeneity using subgroup analysis or meta-regression. So the controversy on this topic continues to persist, which highlights the need for more well-designed randomized control trials with larger sample sizes in the future.

Keywords:

Sleep Initiation and Maintenance Disorders - Sleep Stages - Systematic Review - Nurse - Shift Work Schedule


Publication History

Received: 03 October 2019

Accepted: 13 November 2019

Article published online:
09 November 2023

© 2023. Brazilian Sleep Association. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/)

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