Season of Birth Is Significantly Associated with the Risk of Completed Suicide

Döme, Péter; Kapitány, Balázs; Ignits, Györgyi; Rihmer, Zoltán

doi:10.1016/j.biopsych.2010.03.005

Cited by 28 publications

(22 citation statements)

References 79 publications

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“…Different research teams have described a "birth season" effect in suicide, which may be independent of any associated psychopathology. The largest study to date examined 6.5 millions persons and 80,000 suicides in Hungary and reported that suicide risk was associated with a spring or summer birth: being born in July increased the risk by 14 % compared with a birth in December (Döme et al 2010). Several hypotheses have been proposed to explain these surprising findings.…”

Section: Prenatal and Perinatal Risk Factorsmentioning

confidence: 96%

Stress and Vulnerability: A Developing Model for Suicidal Risk

López-Castromán

Olié

Courtet

2014

Suicide: Phenomenology and Neurobiology

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A large body of research built over the last few decades examines the interaction between stressful events and vulnerability traits to explain how a person becomes suicidal. This stress-diathesis model has been extremely fruitful to improve our understanding of suicidal behavior, but recent findings suggest that interactions could be more complex than expected. Indeed, environmental insults during pregnancy, childhood, or adolescence induce neurodevelopmental changes that increase the vulnerability for suicidal behavior in later life. In this chapter, we will outline the significance of recent neurodevelopmental findings for the stressvulnerability factors of suicidal behavior. The coherence and applicability of an integrative neurodevelopmental model of suicidal behavior will be discussed in the light of current research concerning genetics, neuroimaging, and neuropsychology, and the new classification systems. IntroductionDespite treatment and prevention advances on major psychiatric disorders, suicidal behavior still constitutes a major public health problem. Research into this behavior has increased exponentially during the last decade, and a complex network of factors, both predisposing and triggering the suicidal acts, is being unraveled. This dynamic network connects mental disorders, life experiences, social and familial interactions, physical illness, and neurobiology into what is known as the suicidal process. However, until a deeper understanding of the relationships between these factors is developed, crucial issues such as yielding an accurate prediction of future suicidal acts or determining the best treatment for suicidal patients remain distant.

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Section: Prenatal and Perinatal Risk Factorsmentioning

confidence: 96%

Stress and Vulnerability: A Developing Model for Suicidal Risk

López-Castromán

Olié

Courtet

2014

Suicide: Phenomenology and Neurobiology

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“…Our finding of a peak in births from May to June is in line with the previous season-of-birth studies of suicides in the general population. Döme et al [16] reported about an 8% increase in suicide risk among individuals born in July compared to the average risk of suicide in the population and explained their finding using neurobiological factors. The 5-hydroxyindoleacetic acid (5-HIAA) levels in the cerebrospinal fluid of both infants and adults are known to vary with the season of birth [21,22].…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have found an association between the season of birth and the risk of committing suicide, although suicide is a multidimensional process with major contributions of genetic and environmental risk factors [15]. Döme et al [16], in their large general population study, found a significant birth peak in summer, especially in July (7.6% higher than the average risk in the population investigated), being related to an increased risk of suicide. Salib and Cortina-Borja [17], in their population-based data, showed that individuals born in spring to early summer had an increase of 17% in the risk of suicide compared to those born in the trough months (autumn to early spring).…”

Section: Introductionmentioning

confidence: 99%

“…Salib and Cortina-Borja [17], in their population-based data, showed that individuals born in spring to early summer had an increase of 17% in the risk of suicide compared to those born in the trough months (autumn to early spring). Major studies of the association between the season of birth and suicides have reported a summer peak [16,17,18], but those studies have rarely addressed the influence of mental disorders on the seasonality of suicide victims' births.…”

Section: Introductionmentioning

confidence: 99%

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Season of Birth in Suicides: Excess of Births during the Summer among Schizophrenic Suicide Victims

Karhumaa

Hakko²,

Nauha³

et al. 2013

Neuropsychobiology

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Background: Season of birth is associated with several psychiatric disorders and suicidal behavior. We explored the association between the season of birth and suicide among schizophrenic and psychotic suicide victims. Methods: The study sample consisted of all suicides in the province of Oulu in Northern Finland from 1989 to 2010. Causes of death were extracted from death certificates, and psychiatric diagnoses associated with the hospital treatments were obtained from the Finnish Hospital Discharge Register. The seasons were defined as follows: winter (from November to January), spring (from February to April), summer (from May to July), and autumn (from August to October). Suicide victims (n = 1,902) were categorized as having either schizophrenia (n = 228) or psychosis other than schizophrenia (n = 240). Suicide victims without any hospital-treated mental disorder (n = 1,434) were used as a comparison group. Results: The distribution of births among suicide victims with schizophrenia differed statistically significantly from that observed in the general population, with a peak in summer (OR 1.2, 95% CI 1.0-1.5). Conclusions: Birth during summer may predispose schizophrenic persons to suicide. The putative roles of serotonin, dopamine, and vitamin D status in the season of birth of psychotic suicide victims are discussed.

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“…Season of birth (SOB) has been shown to modify risk for several health outcomes, including a number of neuropsychiatric disorders (Brewerton, Dansky, O'Neil, & Kilpatrick, 2012;Cheng et al, 2013;Davies, Welham, Chant, Torrey, & McGrath, 2003;Disanto et al, 2012;Dome, Kapitany, Ignits, & Rihmer, 2010). In effect, there is evidence indicating that seasonality influences fetal growth and development (Currie & Schwandt, 2013;Flouris, Spiropoulos, Sakellariou, & Koutedakis, 2009;Strand, Barnett, & Tong, 2011;Watson & McDonald, 2007), which bears significance for psychiatric research.…”

Section: Introductionmentioning

confidence: 99%

Season of birth and subclinical psychosis: Systematic review and meta-analysis of new and existing data

Córdova‐Palomera

Calati

Arias

et al. 2015

Psychiatry Research

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Season of birth (SOB) has been shown to modify risk for several health outcomes, including a number of neuropsychiatric disorders. Besides, empirical evidence indicates that subclinical forms of psychosis in the general population share some risk factors with categorical diagnoses of psychosis. Hence, by systematically reviewing and meta-analyzing new and existing data, the current work aimed to determine whether there is evidence to support an association between winter SOB and subclinical psychosis in the general population. Meta-analytic results do not indicate an association between winter SOB and schizotypy in adult populations, though additional reports indicate winter SOB may be a risk factor for psychotic experiences or symptoms in children around 12-15 years (children's meta-analysis OR = 1.12, 95% CI: 1.03-1.21). In the whole new dataset of adults (n = 481, mean age = 22.8 years) the association was not detected, neither in an unadjusted model (OR = 0.89, 95% CI: 0.61-1.29, p = 0.526) nor adjusting for gender and age (β=-0.36, t=-0.64, p=0.521). Overall, results indicate the association between winter SOB and increased subclinical psychosis may hold in children, but not in the broad adult general population.Nevertheless, epidemiological and clinicopathological significance of winter SOB as a risk factor for subclinical psychosis will probably be slight due to the small effect sizes indicated by reports available to date.

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Season of Birth Is Significantly Associated with the Risk of Completed Suicide

Cited by 28 publications

References 79 publications

Stress and Vulnerability: A Developing Model for Suicidal Risk

Stress and Vulnerability: A Developing Model for Suicidal Risk

Season of Birth in Suicides: Excess of Births during the Summer among Schizophrenic Suicide Victims

Season of birth and subclinical psychosis: Systematic review and meta-analysis of new and existing data

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