Seasonal Variation in the Occurrence of Stroke in a Finnish Adult Population
Background and Purpose Seasonal influence on the incidence of and mortality from cerebrovascular disease has been reported during the last three decades, but generally with some discrepancy in results, particularly regarding stroke subtypes. The aim of this study was to examine seasonal variation in...
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Ovid Technologies (Wolters Kluwer Health)
1996
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crovidcr:10.1161/01.str.27.10.1774 2024-09-15T18:16:13+00:00 Seasonal Variation in the Occurrence of Stroke in a Finnish Adult Population The FINMONICA Stroke Register Jakovljević, Dimitrije Salomaa, Veikko Sivenius, Juhani Tamminen, Markku Sarti, Cinzia Salmi, Kalervo Kaarsalo, Esko Narva, Vihtori Immonen-Räihä, Pirjo Torppa, Jorma Tuomilehto, Jaakko 1996 http://dx.doi.org/10.1161/01.str.27.10.1774 https://www.ahajournals.org/doi/full/10.1161/01.STR.27.10.1774 en eng Ovid Technologies (Wolters Kluwer Health) Stroke volume 27, issue 10, page 1774-1779 ISSN 0039-2499 1524-4628 journal-article 1996 crovidcr https://doi.org/10.1161/01.str.27.10.1774 2024-09-05T05:00:21Z Background and Purpose Seasonal influence on the incidence of and mortality from cerebrovascular disease has been reported during the last three decades, but generally with some discrepancy in results, particularly regarding stroke subtypes. The aim of this study was to examine seasonal variation in the incidence, mortality, and case-fatality rate of stroke in data from the FINMONICA population-based stroke register. Methods During 1982 to 1992, 15 449 stroke events were registered in the monitored populations aged 25 to 99 years in three geographic areas of Finland: the provinces of Kuopio and North Karelia in eastern Finland and the Turku/Loimaa area in southwestern Finland. We analyzed the seasonal and monthly incidence, mortality, and case-fatality rate of stroke and subtypes of stroke by pooling the data for the three areas and stratifying by sex and age. Results The rate of occurrence of ischemic stroke events was 12% (95% confidence interval [CI], 5% to 20%) greater in men and 11% (95% CI, 4% to 19%) greater in women in winter than in summer. For intracerebral hemorrhage, we observed a 28% (95% CI, 3% to 58%) greater rate of occurrence in men and a 33% (95% CI, 6% to 66%) greater rate of occurrence in women in winter than in summer. The occurrence of subarachnoid hemorrhage did not vary significantly by season. The greater incidence of ischemic strokes in winter was particularly prominent among men aged 25 to 64 years and less prominent in elderly men and in women. The 28-day case-fatality rate of ischemic stroke showed significant seasonal variation only in women ( P =.001), with the lowest rate in summer. Conclusions There is a significantly greater incidence of ischemic strokes and intracerebral hemorrhages during winter in Finland. Further research that also takes meteorologic and sociodemographic factors into account is warranted, since it may help to determine new ways to prevent strokes. Article in Journal/Newspaper karelia* Ovid Stroke 27 10 1774 1779 |
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English |
description |
Background and Purpose Seasonal influence on the incidence of and mortality from cerebrovascular disease has been reported during the last three decades, but generally with some discrepancy in results, particularly regarding stroke subtypes. The aim of this study was to examine seasonal variation in the incidence, mortality, and case-fatality rate of stroke in data from the FINMONICA population-based stroke register. Methods During 1982 to 1992, 15 449 stroke events were registered in the monitored populations aged 25 to 99 years in three geographic areas of Finland: the provinces of Kuopio and North Karelia in eastern Finland and the Turku/Loimaa area in southwestern Finland. We analyzed the seasonal and monthly incidence, mortality, and case-fatality rate of stroke and subtypes of stroke by pooling the data for the three areas and stratifying by sex and age. Results The rate of occurrence of ischemic stroke events was 12% (95% confidence interval [CI], 5% to 20%) greater in men and 11% (95% CI, 4% to 19%) greater in women in winter than in summer. For intracerebral hemorrhage, we observed a 28% (95% CI, 3% to 58%) greater rate of occurrence in men and a 33% (95% CI, 6% to 66%) greater rate of occurrence in women in winter than in summer. The occurrence of subarachnoid hemorrhage did not vary significantly by season. The greater incidence of ischemic strokes in winter was particularly prominent among men aged 25 to 64 years and less prominent in elderly men and in women. The 28-day case-fatality rate of ischemic stroke showed significant seasonal variation only in women ( P =.001), with the lowest rate in summer. Conclusions There is a significantly greater incidence of ischemic strokes and intracerebral hemorrhages during winter in Finland. Further research that also takes meteorologic and sociodemographic factors into account is warranted, since it may help to determine new ways to prevent strokes. |
format |
Article in Journal/Newspaper |
author |
Jakovljević, Dimitrije Salomaa, Veikko Sivenius, Juhani Tamminen, Markku Sarti, Cinzia Salmi, Kalervo Kaarsalo, Esko Narva, Vihtori Immonen-Räihä, Pirjo Torppa, Jorma Tuomilehto, Jaakko |
spellingShingle |
Jakovljević, Dimitrije Salomaa, Veikko Sivenius, Juhani Tamminen, Markku Sarti, Cinzia Salmi, Kalervo Kaarsalo, Esko Narva, Vihtori Immonen-Räihä, Pirjo Torppa, Jorma Tuomilehto, Jaakko Seasonal Variation in the Occurrence of Stroke in a Finnish Adult Population |
author_facet |
Jakovljević, Dimitrije Salomaa, Veikko Sivenius, Juhani Tamminen, Markku Sarti, Cinzia Salmi, Kalervo Kaarsalo, Esko Narva, Vihtori Immonen-Räihä, Pirjo Torppa, Jorma Tuomilehto, Jaakko |
author_sort |
Jakovljević, Dimitrije |
title |
Seasonal Variation in the Occurrence of Stroke in a Finnish Adult Population |
title_short |
Seasonal Variation in the Occurrence of Stroke in a Finnish Adult Population |
title_full |
Seasonal Variation in the Occurrence of Stroke in a Finnish Adult Population |
title_fullStr |
Seasonal Variation in the Occurrence of Stroke in a Finnish Adult Population |
title_full_unstemmed |
Seasonal Variation in the Occurrence of Stroke in a Finnish Adult Population |
title_sort |
seasonal variation in the occurrence of stroke in a finnish adult population |
publisher |
Ovid Technologies (Wolters Kluwer Health) |
publishDate |
1996 |
url |
http://dx.doi.org/10.1161/01.str.27.10.1774 https://www.ahajournals.org/doi/full/10.1161/01.STR.27.10.1774 |
genre |
karelia* |
genre_facet |
karelia* |
op_source |
Stroke volume 27, issue 10, page 1774-1779 ISSN 0039-2499 1524-4628 |
op_doi |
https://doi.org/10.1161/01.str.27.10.1774 |
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Stroke |
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27 |
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10 |
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1774 |
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1779 |
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1810454224688906240 |