SynthesisScientific reports2017
Latitude affects Morningness-Eveningness: evidence for the environment hypothesis based on a systematic review.
Synthesis in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
What it found
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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.
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Who cites it
14 citing papers in PubMed.
- Change in circadian preference predicts sustained treatment outcomes in patients with unipolar depression and evening preference.Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine · 2022Trial
- Article
- Associations of latitude and photoperiod with sleep duration in a yearlong study of US physicians.Sleep medicine · 2025Article
- Adaptive introgression in modern human circadian rhythm genes.Npj biological timing and sleep · 2025Article
- Telomere length and chronotype among women in the California Teachers Study (CTS).Chronobiology international · 2024Article
- Infrared-A to improve mood: an exploratory study of water-filtered infrared-A (wIRA) exposure.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2024Article
- Comparison of chronotype and learning motivation in medical university students.BMC medical education · 2024Article
- Archaic Introgression Shaped Human Circadian Traits.Genome biology and evolution · 2023Article
- Chronotype, chrononutrition and glucose tolerance among prediabetic individuals: research protocol for a prospective longitudinal study Chrono-DM™.BMC primary care · 2022Observational
- Associations between chronotype, social jetlag, and weekday sleep in women with irritable bowel syndrome.Chronobiology international · 2021Article
- Social Jetlag and Chronotypes in the Chinese Population: Analysis of Data Recorded by Wearable Devices.Journal of medical Internet research · 2019Article
- Latitudinal trends in human primary activities: characterizing the winter day as a synchronizer.Scientific reports · 2018Article
- Latitudinal cline of chronotype.Scientific reports · 2017Article
- From Lark to Owl: developmental changes in morningness-eveningness from new-borns to early adulthood.Scientific reports · 2017Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
2 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Morningness-eveningness (M/E) is an individual trait related to a person's sleep-wake cycle and preference for morning or evening hours. The "environment hypothesis" suggests that M/E is dependent on environmental factors, such as latitude, mean average temperature and photoperiod. We here analyzed a large number of datasets to assess this effect based on a systematic review. Data were from a total of 87 datasets and 35,589 individuals based on 28 countries. Partial correlations correcting for age revealed significant relationships between M/E and latitude, mean yearly temperature, photoperiod and sunset. Evening orientation was related to higher latitude, longer days and later sunset. Morning orientation was related to higher average temperatures. Percentage of females and sunrise time had no significant influence. These variables (sunset, temperature, photoperiod) were then input in a general linear model. The full model showed an influence of age and of sunset on CSM scores, but not of photoperiod and average temperature. Sunset, therefore, seems to be the most important statistical predictor for the observed latitudinal gradient.
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Registered trials
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