A Role of Sunshine in the Triggering of Suicide

Petridou, Eleni; Papadopoulos, Fotios C.; Frangakis, Constantine; Skalkidou, Alkistis; Trichopoulos, Dimitrios

doi:10.1097/00001648-200201000-00017

Cited by 155 publications

(136 citation statements)

References 24 publications

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“…4,5 Although few studies have addressed this issue in the Southern Hemisphere, their fi ndings were similar. 2 They have shown that higher suicides rates occur during months with more daily sunlight hours.…”

Section: Descritoresmentioning

confidence: 72%

“…4,5 A less pronounced association was found in temperate zones, 2 and no association was seen in Singapore, located at the Equator line. 3 The present study data support the fi ndings of Chew & McCleary, 2 who compared suicidal behavior among 28 countries and concluded that seasonal variation in suicide is high in temperate zones (between 30° and 60° north and south of the Equator) and low in the tropics.…”

Section: Discussionmentioning

confidence: 86%

“…To the There is a hypothetical role of melatonin metabolism explaining how sunshine or correlated factors are related to suicide. One putative factor emphasized by various authors, including Petridou et al 5 would be related to one of several mood regulators, the melatonin variation according to season and differences of solar irradiation. Melatonin secretion has been shown to be abnormal in some severely depressed patients but the majority of these studies were conducted in the Northern Hemisphere.…”

Section: Discussionmentioning

confidence: 99%

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Sunshine and suicide at the tropic of Capricorn, São Paulo, Brazil, 1996-2004

Nejar

Lotufo²

2007

Rev. Saúde Pública

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Several studies have confi rmed seasonal variation in suicide rates according to hours of sunshine. The suicide pattern was assessed in São Paulo, southeastern Brazil, at the tropic of Capricorn from 1996 to 2004. Poisson regression was employed to estimate parameters of seasonality, as well as to verify associations for each day between daylight duration and suicide. During the nine-year study period, there were 3,984 suicides (76.9% in men; median age=38.7 years old). Seasonal averages of suicides were similar, as were monthly averages. Poisson regression did not reveal any association between suicide rates and hours of sunshine (p=0.45) for both sexes. In conclusion, no seasonal pattern was observed for suicides. RESUMOEstudos epidemiológicos têm confi rmado que as taxas de suicídio apresentam variação sazonal relacionada às horas de insolação. O padrão de suicídios foi analisado na cidade de São Paulo, Brasil, no trópico de Capricórnio, de 1996 a 2004. A regressão de Poisson foi utilizada para estimar padrões de sazonalidade, bem como verifi car a associação dia-a-dia entre duração da insolação e suicídio. Durante os nove anos houve 3.984 suicídios (76,9% homens; mediana de idade=38,7 anos). As médias de suicídio por estação do ano e por mês de suicídio foram similares. Segundo a regressão de Poisson, não houve associação entre insolação e suicídio (p=0,45) para ambos os sexos. Conclui-se que não houve padrão sazonal de suicídios na cidade de São Paulo. DESCRITORES:

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Section: Descritoresmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

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Sunshine and suicide at the tropic of Capricorn, São Paulo, Brazil, 1996-2004

Nejar

Lotufo²

2007

Rev. Saúde Pública

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“…Seasonality was also observed for suicide with an increase in suicides rates in spring or early summer. This could be related to the seasonal mood disorders (Chew & McCleary 1995;Petridou et al 2002;Lambert et al 2003;Reutfors et al 2009). The aim of this study is to assess the prevalence of voluntary and involuntary admissions with particular reference to seasonality and clinical correlates, in a sample of patients consecutively admitted to our psychiatric unit during a period of 24 months.…”

Section: Objectivementioning

confidence: 99%

Involuntary admissions in Italy: the impact of seasonality

Aguglia

Moncalvo

Solia

et al. 2016

International Journal of Psychiatry in Clinical Practice

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Objective: The aim of this study is to assess the prevalence of involuntary admissions with regard to seasonality and clinical associated features, in a sample of patients admitted to a psychiatric unit in a period of 24 months. Methods: All subjects consecutively admitted to the Psychiatric Inpatient Unit of the San Luigi Gonzaga Hospital, Orbassano (University of Turin, Italy) from September 2013 to August 2015 were recruited. Socio-demographic and clinical characteristics were collected. Results: Seven hundred and thirty admissions in psychiatric ward were recognized. The prevalence of involuntary admission was 15.4%. Patients with involuntary hospitalizations showed a higher education level, a higher prevalence of admission in spring/summer with a significant peak in June, a longer duration of hospitalization and a lower suicide ideation. Among involuntary admissions, physical restraint and suicide attempts were more prevalent during spring compared to the other seasons. Conclusions: Seasonality has an important role in the psychopathology of psychiatric disorders, particularly in bipolar and related disorder, and may represent an influencing factor in hospital admissions and hospitalizations. Seasonal pattern must be considered while managing diagnosis and treatment of mental disorders, with regard to prevention and psychoeducation of patients.

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“…Les études médicales établissent fréquemment une relation entre le suicide et la dépression 1 et, de son côté, la biologie associe la dépression avec la mélatonine, une composante neurohormonale qui joue un rôle significatif dans la physiologie circadienne (Reppert et al, 1988 ;Kettl et al, 1997 ;Li et al, 2006). La rareté de la lumière dans les pays boréaux pourrait alors être associée aux taux élevés de suicide dans les pays comme la Finlande, le Danemark ou le Canada (Petridou et al, 2001). Dans tous les cas, la rythmicité saisonnière du suicide remet en question cette possibilité puisque que le taux de suicide augmente au printemps, alors que les journées se rallongent, et diminue en hiver lorsque les journées sont plus courtes.…”

Section: Les Rythmes Temporels Cosmobiologiquesunclassified

Les dimensions temporelles du suicide : une hypothèse*

Carbonell-Camós

2009

smq

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Dans cet article, l’auteur aborde les dimensions temporelles du suicide en tenant compte des multiples approches existantes — physiologie circadienne, épidémiologie psychiatrique ou sociologie du suicide — mais en privilégiant une perspective socio anthropologique. À partir de cette perspective, le suicide est examiné tel un phénomène social qui s’inscrit dans le temps. En partant d’une préoccupation propre à l’anthropologie du temps, soit la relation entre le temps de la nature et le temps de la société, l’auteur aborde un des thèmes clés de l’étude du suicide déjà énoncé par Durkheim, soit la relation entre le changement qui est une expression de base du passage du temps et le suicide. Après avoir présenté différentes contributions scientifiques sur le sujet, l’auteur propose une hypothèse permettant d’intégrer l’influence du temps relié aux phénomènes naturels (les rythmes cosmo-biologiques) et celle du temps relié aux phénomènes sociaux (rythmes politico-économiques) en relation avec le suicide et ce à partir de la théorie de Gabennesch portant sur les « promesses non tenues ».In this article, the author examines the temporal dimensions of suicide by taking into account the multiple existing approaches—circadian physiology, psychiatric or sociological epidemiology of suicide—however promoting a socio-anthropological perspective. From this perspective, suicide is examined as a social phenomenon inscribed in time. By beginning with a concern that is characteristic of anthropology of time, knowingly the relation between time of nature and time of society, the author addresses a key issue of the study of suicide already elaborated by Durkheim, in the relation between change that is a basic expression of the passage of time and suicide. After presenting different scientific contributions on the subject, the author proposes an hypothesis allowing integration of the influence of time related to natural phenomenon (cosmobiological rhythms) and the relation of time to social phenomenon (politico-economic rhythms) in relation with suicide and this, according to Gabennesch’s theory of “failed promises.”En este artículo el autor aborda las dimensiones temporales del suicidio teniendo en cuenta los múltiples enfoques existentes – fisiología circadiana, epidemiología psiquiátrica o sociología del suicidio – pero privilegiando una perspectiva socio-antropológica. A partir de esta perspectiva, se examina el suicidio como un fenómeno social inscrito en el tiempo. Partiendo de una preocupación propia de la antropología del tiempo – es decir, la relación entre el tiempo de la naturaleza y el tiempo de la sociedad – el autor aborda uno de los temas clave del estudio del suicidio anteriormente enunciado por Durkheim, o sea la relación entre el cambio, que es una expresión de base del paso del tiempo, y el suicidio. Después de haber presentado diferentes contribuciones científicas acerca del tema, el autor propone una hipótesis que permite integrar la influencia del tiempo asociado a los fenómenos naturales (los ritmos cosmo-bioló...

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A Role of Sunshine in the Triggering of Suicide

Cited by 155 publications

References 24 publications

Sunshine and suicide at the tropic of Capricorn, São Paulo, Brazil, 1996-2004

Sunshine and suicide at the tropic of Capricorn, São Paulo, Brazil, 1996-2004

Involuntary admissions in Italy: the impact of seasonality

Les dimensions temporelles du suicide : une hypothèse*

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