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Seasonal Patterns of Incidence and Case Fatality of Stroke in Malmö, Sweden: The STROMA Study.

Khan, Farhad LU ; Engström, Gunnar LU ; Jerntorp, Ingela LU ; Pessah-Rasmussen, Hélène LU and Janzon, Lars LU (2005) In Neuroepidemiology 24(1-2). p.26-31
Abstract
Background: Studies on the temporal variation in stroke incidence have reported inconsistent results. Few have studied the temporal variations in case fatality. No study on incidence and case fatality of stroke by season in Sweden has been found. This study explores the weekly, monthly and seasonal variations in incidence and 28-day case fatality of stroke. Methods: A total of 7,129 patients with first-ever stroke during the period 1989-1999 were retrieved from the Stroke Register of Malmo, Sweden. chi(2) test was performed to test the seasonal differences and Poisson regression analysis was used to calculate the case fatality ratios adjusted for sex and age. Results: The stroke cases were on the whole randomly distributed over the study... (More)
Background: Studies on the temporal variation in stroke incidence have reported inconsistent results. Few have studied the temporal variations in case fatality. No study on incidence and case fatality of stroke by season in Sweden has been found. This study explores the weekly, monthly and seasonal variations in incidence and 28-day case fatality of stroke. Methods: A total of 7,129 patients with first-ever stroke during the period 1989-1999 were retrieved from the Stroke Register of Malmo, Sweden. chi(2) test was performed to test the seasonal differences and Poisson regression analysis was used to calculate the case fatality ratios adjusted for sex and age. Results: The stroke cases were on the whole randomly distributed over the study period of 4,017 days. Incidence of all types of stroke, intracerebral hemorrhage and subarachnoid hemorrhage showed no variation by season, month or weekday, but incidence of cerebral infarction for the total population was higher in autumn and winter. Twenty-eight-day case fatality (930 fatal events, 13%) clustered significantly over the study period. Winter emerged as the peak season among men (12.5%), women (17.2%) and total population (15.1%). No consistent variation of incidence and case fatality of stroke by month or weekday was found. Conclusion: Case fatality after stroke demonstrates a seasonal variation with a peak in winter. Incidence of stroke showed no consistent association with season, month or weekday. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Sweden, temporal trends, stroke, case fatality
in
Neuroepidemiology
volume
24
issue
1-2
pages
26 - 31
publisher
Karger
external identifiers
  • pmid:15459506
  • wos:000226021500005
  • scopus:10844272241
ISSN
1423-0208
DOI
10.1159/000081046
language
English
LU publication?
yes
id
7bf94dda-7751-4db9-aedb-eb4f9f634ae5 (old id 129947)
alternative location
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=15459506&dopt=Abstract
date added to LUP
2007-07-06 11:10:10
date last changed
2017-11-05 03:38:35
@article{7bf94dda-7751-4db9-aedb-eb4f9f634ae5,
  abstract     = {Background: Studies on the temporal variation in stroke incidence have reported inconsistent results. Few have studied the temporal variations in case fatality. No study on incidence and case fatality of stroke by season in Sweden has been found. This study explores the weekly, monthly and seasonal variations in incidence and 28-day case fatality of stroke. Methods: A total of 7,129 patients with first-ever stroke during the period 1989-1999 were retrieved from the Stroke Register of Malmo, Sweden. chi(2) test was performed to test the seasonal differences and Poisson regression analysis was used to calculate the case fatality ratios adjusted for sex and age. Results: The stroke cases were on the whole randomly distributed over the study period of 4,017 days. Incidence of all types of stroke, intracerebral hemorrhage and subarachnoid hemorrhage showed no variation by season, month or weekday, but incidence of cerebral infarction for the total population was higher in autumn and winter. Twenty-eight-day case fatality (930 fatal events, 13%) clustered significantly over the study period. Winter emerged as the peak season among men (12.5%), women (17.2%) and total population (15.1%). No consistent variation of incidence and case fatality of stroke by month or weekday was found. Conclusion: Case fatality after stroke demonstrates a seasonal variation with a peak in winter. Incidence of stroke showed no consistent association with season, month or weekday.},
  author       = {Khan, Farhad and Engström, Gunnar and Jerntorp, Ingela and Pessah-Rasmussen, Hélène and Janzon, Lars},
  issn         = {1423-0208},
  keyword      = {Sweden,temporal trends,stroke,case fatality},
  language     = {eng},
  number       = {1-2},
  pages        = {26--31},
  publisher    = {Karger},
  series       = {Neuroepidemiology},
  title        = {Seasonal Patterns of Incidence and Case Fatality of Stroke in Malmö, Sweden: The STROMA Study.},
  url          = {http://dx.doi.org/10.1159/000081046},
  volume       = {24},
  year         = {2005},
}