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 […]

Suicide timing in 18 states of the United States from 2003-2014

We investigated suicide timing over different time periods by age, sex and race/ethnicity. A total of 122,107 suicide deaths were identified from the population-based U.S. National Violent Death Reporting System in 18 U.S. states from 2003 through 2014. Suicides significantly increased (p < .05) from March to peak in September before falling, the first week of the […]

Seasonal variation in major depressive episode prevalence in Canada

Background.The purpose of this paper is to describe variation, over the months of the year, in major depressive episode (MDE) prevalence. This is an important aspect of the epidemiological description of MDE, and one that has received surprisingly little attention in the literature. Evidence of seasonal variation in MDE prevalence has been weak and contradictory. […]

The timing of general population and patient suicide in England, 1997-2012.

Highlights •Temporal variation is evident in suicide in England with higher risk in the early part of the year. •Suicide risk was significantly lower during the Christmas period. •A peak in suicide was found on New Year’s Day and Mondays in the general population. •Suicide risk was higher on Mondays in patients aged over 50 […]

Suicides in Trakya Region, Turkey, From 1984 to 2004

This study investigated some features of suicides in the Trakya region of Turkey. During the 21-year period, January 1984-September 2004, there were 137 suicides autopsied. Suicides comprised 16.1% of all forensic autopsies. 27% of cases were between 21 & 30 years of age. Males constituted 78.1% of cases. Suicide rates in males showed an increase […]