Season of Birth in Suicides: Excess of Births during the Summer among Schizophrenic Suicide Victims
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 No...
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crskarger:10.1159/000355300 2024-06-09T07:48:32+00:00 Season of Birth in Suicides: Excess of Births during the Summer among Schizophrenic Suicide Victims Karhumaa, Tuomo Hakko, Helinä Nauha, Rauno Räsänen, Pirkko 2013 http://dx.doi.org/10.1159/000355300 https://www.karger.com/Article/Pdf/355300 en eng S. Karger AG https://www.karger.com/Services/SiteLicenses https://www.karger.com/Services/SiteLicenses Neuropsychobiology volume 68, issue 4, page 238-242 ISSN 0302-282X 1423-0224 journal-article 2013 crskarger https://doi.org/10.1159/000355300 2024-05-15T13:31:33Z 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. Article in Journal/Newspaper Northern Finland Karger Neuropsychobiology 68 4 238 242 |
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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. |
format |
Article in Journal/Newspaper |
author |
Karhumaa, Tuomo Hakko, Helinä Nauha, Rauno Räsänen, Pirkko |
spellingShingle |
Karhumaa, Tuomo Hakko, Helinä Nauha, Rauno Räsänen, Pirkko Season of Birth in Suicides: Excess of Births during the Summer among Schizophrenic Suicide Victims |
author_facet |
Karhumaa, Tuomo Hakko, Helinä Nauha, Rauno Räsänen, Pirkko |
author_sort |
Karhumaa, Tuomo |
title |
Season of Birth in Suicides: Excess of Births during the Summer among Schizophrenic Suicide Victims |
title_short |
Season of Birth in Suicides: Excess of Births during the Summer among Schizophrenic Suicide Victims |
title_full |
Season of Birth in Suicides: Excess of Births during the Summer among Schizophrenic Suicide Victims |
title_fullStr |
Season of Birth in Suicides: Excess of Births during the Summer among Schizophrenic Suicide Victims |
title_full_unstemmed |
Season of Birth in Suicides: Excess of Births during the Summer among Schizophrenic Suicide Victims |
title_sort |
season of birth in suicides: excess of births during the summer among schizophrenic suicide victims |
publisher |
S. Karger AG |
publishDate |
2013 |
url |
http://dx.doi.org/10.1159/000355300 https://www.karger.com/Article/Pdf/355300 |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_source |
Neuropsychobiology volume 68, issue 4, page 238-242 ISSN 0302-282X 1423-0224 |
op_rights |
https://www.karger.com/Services/SiteLicenses https://www.karger.com/Services/SiteLicenses |
op_doi |
https://doi.org/10.1159/000355300 |
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Neuropsychobiology |
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68 |
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4 |
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238 |
op_container_end_page |
242 |
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1801380297021849600 |