ArticleJournal of circadian rhythms2011
Relationship between daylength and suicide in Finland.
Article in Journal of circadian rhythms, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.
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
21 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Climate change and suicide epidemiology: a systematic review and meta-analysis of gender variations in global suicide rates.Frontiers in public health · 2024Pooled it
- Reduced Slow-Wave Sleep and Sleep-Disordered Breathing Are Linked to Suicidal Ideation in Major Depressive Disorder.Brain and behavior · 2026Article
- Daylight saving time was not associated with a change in suicide rates in Austria, Switzerland and Sweden.European journal of public health · 2024Article
- Association between provincial sunshine duration and mortality rates in China: Panel data study.Heliyon · 2023Article
- Effect of Ketamine on Sleep in Treatment-Resistant Depression: A Systematic Review.Pharmaceuticals (Basel, Switzerland) · 2023Review
- Impact of the COVID-19 Pandemic on Adolescent Self-Harm: Based on a National Emergency Department Information System.International journal of environmental research and public health · 2023Article
- Seasonal Variation in the Brain μ-Opioid Receptor Availability.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2021Article
- Article
- Seasonality of Suicides among Victims Who Are under the Influence of Alcohol.International journal of environmental research and public health · 2019Article
- Ketamine-Induced Glutamatergic Mechanisms of Sleep and Wakefulness: Insights for Developing Novel Treatments for Disturbed Sleep and Mood.Handbook of experimental pharmacology · 2019Article
- Epidemiology of Suicidal Behavior in Malaga (Spain): An Approach From the Prehospital Emergency Service.Frontiers in psychiatry · 2019Article
- Epidemiology of Suicide and the Psychiatric Perspective.International journal of environmental research and public health · 2018Review
- Nocturnal Wakefulness Is Associated With Next-Day Suicidal Ideation in Major Depressive Disorder and Bipolar Disorder.The Journal of clinical psychiatry · 2016Observational
- Article
- Suicide attempts and emergency room psychiatric consultation.BMC psychiatry · 2015Article
- Local daily temperatures, thermal seasons, and suicide rates in Finland from 1974 to 2010.Environmental health and preventive medicine · 2014Article
- Variation and seasonal patterns of suicide mortality in Finland and Sweden since the 1750s.Environmental health and preventive medicine · 2013Article
- Atmospheric pressure and suicide attempts in Helsinki, Finland.International journal of biometeorology · 2012Article
- Clock gene variants in mood and anxiety disorders.Journal of neural transmission (Vienna, Austria : 1996) · 2012Review
- Seasonality of suicidal behavior.International journal of environmental research and public health · 2012Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundMany previous studies have documented seasonal variation in suicides globally. We re-assessed the seasonal variation of suicides in Finland and tried to relate it to the seasonal variation in daylength and ambient temperature and in the discrepancy between local time and solar time.
methodsThe daily data of all suicides from 1969 to 2003 in Finland (N = 43,393) were available. The calendar year was divided into twelve periods according to the length of daylight and the routinely changing time difference between sun time and official time. The daily mean of suicide mortality was calculated for each of these periods and the 95% confidence intervals of the daily means were used to evaluate the statistical significance of the means. In addition, daily changes in sunshine hours and mean temperature were compared to the daily means of suicide mortality in two locations during these afore mentioned periods.
resultsA significant peak of the daily mean value of suicide mortality occurred in Finland between May 15th and July 25th, a period that lies symmetrically around the solstice. Concerning the suicide mortality among men in the northern location (Oulu), the peak was postponed as compared with the southern location (Helsinki). The daily variation in temperature or in sunshine did not have significant association with suicide mortality in these two locations.
conclusionsThe period with the longest length of the day associated with the increased suicide mortality. Furthermore, since the peak of suicide mortality seems to manifest later during the year in the north, some other physical or biological signals, besides the variation in daylight, may be involved. In order to have novel means for suicide prevention, the assessment of susceptibility to the circadian misalignment might help.
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.