ArticleBMJ open2013
Suicide risk in relation to air pollen counts: a study based on data from Danish registers.
Article in BMJ open, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 1 of them a synthesis that pooled it.
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Who cites it
24 citing papers in PubMed, 1 synthesis or guideline pooled it, 47 citations in OpenAlex.
- Climate change and suicide epidemiology: a systematic review and meta-analysis of gender variations in global suicide rates.Frontiers in public health · 2024Pooled it
- Toxoplasma gondii and suicidal behaviour: discovery, cross-diagnostic confirmation and pathway exploration.Folia parasitologica · 2025Article
- Pollen effects in a changing climate: Ragweed pollen exposure and sleepiness in immunotherapy patients of a Southeastern Michigan allergy clinic.International journal of biometeorology · 2024Article
- Perspectives on environment and health research in Denmark.Scandinavian journal of public health · 2024Article
- Psychoneuroimmunology: The new frontier in suicide research.Brain, behavior, & immunity - health · 2021Article
- Short-term exposures to atmospheric evergreen, deciduous, grass, and ragweed aeroallergens and the risk of suicide in Ohio, 2007-2015: Exploring disparities by age, gender, and education level.Environmental research · 2021Article
- Sunshine, temperature and suicidal behaviour in patients treated with antidepressants: an explorative nested case-control study.Scientific reports · 2021Article
- Lipophilic vs. hydrophilic statins and psychiatric hospitalizations and emergency room visits in US Veterans with schizophrenia and bipolar disorder.Pteridines · 2021Article
- Review
- Urban-scale variation in pollen concentrations: A single station is insufficient to characterize daily exposure.Aerobiologia · 2020Article
- Similar Allergenicity to DifferentMedicina (Kaunas, Lithuania) · 2019Article
- Effect of intra-urban temperature variation on tree flowering phenology, airborne pollen, and measurement error in epidemiological studies of allergenic pollen.The Science of the total environment · 2019Article
- Inflammation as a unique marker of suicide ideation distinct from depression syndrome among U.S. adults.Journal of affective disorders · 2019Article
- Mood Worsening on Days with High Pollen Counts is associated with a Summer Pattern of Seasonality.Pteridines · 2019Article
- Seasonal Allergies and Psychiatric Disorders in the United States.International journal of environmental research and public health · 2018Article
- Pollen exposure and hospitalization due to asthma exacerbations: daily time series in a European city.International journal of biometeorology · 2017Article
- Animal models to improve our understanding and treatment of suicidal behavior.Translational psychiatry · 2017Review
- Mental Health in Allergic Rhinitis: Depression and Suicidal Behavior.Current treatment options in allergy · 2017Article
- The role of inflammation in suicidal behaviour.Acta psychiatrica Scandinavica · 2015Review
- Article
Corrections and comments
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Authors and funding
4 authors at 3 institutions in 3 countries.
Funding
Abstract
objectivesSince the well-observed spring peak of suicide incidents coincides with the peak of seasonal aeroallergens as tree-pollen, we want to document an association between suicide and pollen exposure with empirical data from Denmark.
designEcological time series study.
settingData on suicide incidents, air pollen counts and meteorological status were retrieved from Danish registries.
participants13 700 suicide incidents over 1304 consecutive weeks were obtained from two large areas covering 2.86 million residents. PRIMARY AND SECONDARY OUTCOME MEASURES: Risk of suicide associated with pollen concentration was assessed using a time series Poisson-generalised additive model.
resultsWe noted a significant association between suicide risk and air pollen counts. A change of pollen counts levels from 0 to '10-<30' grains/m(3) air was associated with a relative risk of 1.064, that is, a 6.4% increase in weekly number of suicides in the population, and from 0 to '30-100' grains, a relative risk of 1.132. The observed association remained significant after controlling for effects of region, calendar time, temperature, cloud cover and humidity. Meanwhile, we observed a significant sex difference that suicide risk in men started to rise when there was a small increase of air pollen, while the risk in women started to rise until pollen grains reached a certain level. High levels of pollen had slightly stronger effect on risk of suicide in individuals with mood disorder than those without the disorder.
conclusionsThe observed association between suicide risk and air pollen counts supports the hypothesis that aeroallergens, acting as immune triggers, may precipitate suicide.
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