Suicidality and mood: The impact of trends, seasons, day of the week, and time of day on explicit and implicit cognitions among an online community sample

Decades of research have established seasonality effects on completed and attempted suicides, with rates increasing in spring. Little advancements have been made to explain this phenomenon, with most studies focusing almost exclusively on the number of suicide attempts and deaths. Using more than six years of data collected among a US, UK, and Canadian online […]

Suicide deaths and nonfatal hospital admissions for deliberate self-harm in the United States: Temporality by day of week and month of year

Background: No one knows whether the temporality of nonfatal deliberate self-harm in the United States mirrors the temporality of suicide deaths. Aims: To analyze day- and month-specific variation in population rates for suicide fatalities and, separately, for hospital admissions for nonfatal deliberate self-harm. Methods: For 12 states, we extracted vital statistics data on all suicides (n = 11,429) and hospital discharge […]

Seasonal suicide trends in adolescents in the US: Did they explain the apparent effect of the Netflix show 13 Reasons Why?

Introduction: Controversy surrounds the effects of the first season of the Netflix show 13 Reasons Why on adolescent suicide in the United States. This research reexamined the question using more sensitive weekly suicide counts and more sensitive tests for seasonal changes in suicide. Methods: Weekly suicide counts for adolescents ages 10– 19 and young people […]

Increased suicide risk among younger women in winter during full moon in northern Europe: An artifact or a novel finding?

Available evidence suggests that there is no effect of moon phases on suicidal behavior. However, a Finnish study recently reported elevated suicide rates during full-moon, but only among premenopausal women and only in winter. This could not be replicated in an Austrian study and stirred a discussion about whether the Finnish finding was false-positive or […]

Seasonal changes and decrease of suicides and suicide attempts in France over the last 10 years

The objective of this study was to examine the evolution of suicides and suicide attempts over the last 10 years in France. We analyzed the number of deaths by suicide and suicide attempts in metropolitan France (2009–2018) from French national databases, on a daily, weekly or monthly basis. Seasonal variation in suicide rates was modeled using […]

The impact of daylight on suicide rates

Since Durkheim and Morselli found a spring peak in suicides in the late 19th century, researchers have presented possible explanations, including daylight variation, for this seasonal pattern. Our identification strategy exploits the idiosyncratic variation in daylight within Norwegian regions, arising from the country’s substantial latitudinal range. We use full population data for a period of […]

Can suicide behavior and seasonality of suicide be predicted from inflammatory parameters in adolescents?

According to the 2017 data of World Health organization approximately 800 million individuals commit suicide annually. After understanding that psychiatric  disorders start the inflammation process by suppressing the brain, a number of studies using neutrophil/lymphocyte ratio, platelet/lymphocyte ratio and  monocyte/lymphocyte ratio have been conducted. Platelet/lymphocyte ratio, neutrophil/lymphocyte ratio, monocyte/lymphocyte ratio and other hemogram parameters may […]

Variations in seasonal solar insolation are associated with a history of suicide attempts in bipolar I disorder

Background Bipolar disorder is associated with circadian disruption and a high risk of suicidal behavior. In a previous exploratory study of patients with bipolar I disorder, we found that a history of suicide attempts was associated with differences between winter and summer levels of solar insolation. The purpose of this study was to confirm this […]

Seasonal trends in hospitalization of attempted suicide and self-inflicted injury in United States adults

Introduction Suicide is the 10th leading cause of death in the United States (US) and the prevalence continues to increase. It is estimated that there is an average of 25 attempted suicides for every suicide death in the US, and the economic burden of suicide and attempted suicide is high. Identification of those at risk […]

Risk factors of a suicide reattempt by seasonality and the method of a previous suicide attempt: A cohort study in a Japanese primary care hospital

Suicide has a great impact on the individual whose life is lost and the bereaved family members. The risk of a suicide reattempt is particularly high during the first 12 months after a suicide attempt. In this cohort study, risk factors for a suicide reattempt were explored among 291 patients at suicide risk. Clinical and demographic […]

Associations of suicide seasonality with rural-urban residence and mental disorders in Ilam, Iran.

Suicide is one of the ten leading causes of death in Western countries and the second leading cause in people aged 15-19 years. In recent decades, annual suicide attempts reportedly ranged from 2.6 to 1,100 per 100,000 people, while the rate of lifetime prevalence ranges from 750 to 5,930 per 100,000 worldwide.1 Studies regarding suicide […]

Season of birth is different in Inuit suicide victims born into traditional than into modern lifestyle: A register study from Greenland.


Seasonal differences in the day-of-the-week pattern of suicide in Queensland, Australia.

Various temporal patterns of suicide events, according to time of day, day of week, month and season, have been identified. However, whether different dimensions of time interact has not been investigated. Using suicide data from Queensland, Australia, this study aims to verify if there is an interaction effect between seasonal and day-of-the-week distribution. When seasonal […]

Effects of sunshine on suicide rates.

Seasonal spring peaks of suicide are well described in epidemiological studies, but their origin is poorly understood. More recent evidence suggests that this peak may be associated with the increase in the duration of sunshine in spring. We investigated the effect of number of sunshine hours per month on suicide rates in Austria between 1996 […]

Suicide and seasonality.

Objective: Seasonal variation of deaths by suicide offers an important pathway in the study of possible suicide determinants of suicide and consequently suicide prevention. Method: We conducted a review of the literature on suicide seasonality, assessing articles published between 1979 and 2009. Results: The majority of the studies confirm a peak in spring, mainly for […]

Seasonality of self-destructive behaviour: seasonal variations in demographic and suicidal characteristics in Van, Turkey.


Seasonal Differences in Suicide Birth Rate in Alaska Natives Compared to Other Populations

Seasonal differences in suicide birth rates among Alaska Natives & for populations at different latitudes (resident of the Yukon, Saskatchewan, Montana, Wyoming, & Pennsylvania) were investigated. Seasonal birth rates for the general population were similarly examined. Suicide birth rates showed small seasonal variations for Alaska Natives with summer births showing more suicides. However, at lower […]

Monthly and seasonal variations in emergency department visits for drug-related suicide attempts: 2004-2008

Report by SAMHSA reflecing relationship between seasonal changes and visits to the emergency room because of drug-related suicide attempts.

Monthly and seasonal variations in emergency department visits for drug-related suicide attempts: 2004-2008

Report by SAMHSA reflecing relationship between seasonal changes and visits to the emergency room because of drug-related suicide attempts.

The Meteorological Factors Associated With Suicide

This study analyzed meteorological conditions at the time of attempted or completed suicides & examined the possible link between the changes of meteorological factors & the frequency of suicidal behaviour in the Mostar region, Bosnia. Results showed meteorological factors of the days with suicidal behaviour were similar to the day prior, but there was a […]

Climate-Suicide Relationships: a Research Problem in Need of Geographic Methods and Cross-Disciplinary Perspectives


Suicide Prevalence in Kosova for the Period 2007-2008

This survey analyzed suicide in Kosova for the period 2000-2008, focusing on 2007-2008. For the year 2000, there was an increase of 122 percent in suicide cases compared to 1983. After 2005, a slight decrease in suicides was noted. Suicides were significantly more prevalent in males than females in both 2007 & 2008. Most suicides […]

Tree Pollen Peaks are Associated With Increased Nonviolent Suicide in Women

In this letter to the editor, the authors report on a study in which they compared the suicide rates before, during, & after periods of peak atmospheric pollen. During the treee allergy season there was a two-fold increase in the rate of nonviolent suicides among younger females in the peak-pollen period compared with the prepollen […]