ArticlePloS one2015
Natural light exposure, sleep and depression among day workers and shiftworkers at arctic and equatorial latitudes.
Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
12 citing papers in PubMed.
- Effects of Urban Forest Therapy Program on Depression Patients.International journal of environmental research and public health · 2022Trial
- Circadian rhythm entrainment factors and premenstrual syndrome: a cross-sectional study of the roles of light exposure, exercise, and meal timing.BMC women's health · 2026Article
- Assessing seasonal and weather effects on depression and physical activity using mobile health data.Npj mental health research · 2025Article
- Detailed assessment of night shift work aspects and potential mediators of its health effects: the contribution of field studies.Frontiers in public health · 2025Article
- Metadata recommendations for light logging and dosimetry datasets.BMC digital health · 2024Article
- How Sleep Research in Extreme Environments Can Inform the Military: Advocating for a Transactional Model of Sleep Adaptation.Current psychiatry reports · 2023Review
- Daily changes in light influence mood via inhibitory networks within the thalamic perihabenular nucleus.Science advances · 2022Article
- Gut Hormones as Potential Therapeutic Targets or Biomarkers of Response in Depression: The Case of Motilin.Life (Basel, Switzerland) · 2021Review
- Environmental exposures and sleep outcomes: A review of evidence, potential mechanisms, and implications.Environmental research · 2021Review
- An exploratory study examining the associations between sunlight exposure, sleep behaviours and sleep outcomes during an Arctic summer.International journal of circumpolar health · 2019Article
- Delayed Sleep in Winter Related to Natural Daylight Exposure among Arctic Day Workers.Clocks & sleep · 2019Article
- Shortening day length: a potential risk factor for perinatal depression.Journal of behavioral medicine · 2018Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
Abstract
objectivesThis study aimed to investigate the relationship between individual natural light exposure, sleep need, and depression at two latitudes, one extreme with a few hours of light per day during winter, and the other with equal hours of light and darkness throughout the year.
methodsThis cross-sectional study included a sample of Brazilian workers (Equatorial, n = 488 workers) and a Swedish sample (Arctic, n = 1,273).
resultsThe reported mean total natural light exposure per 4-week cycle differed significantly between the Equatorial and Arctic regions. However, shiftworkers from both sites reported similar hours of natural light exposure. Short light exposure was a predictor for insufficient sleep.
conclusionReduced exposure to natural light appears to increase the perception of obtaining insufficient sleep. Arctic workers were more prone to develop depression than Equatorial workers.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.