Ischemic stroke and shift work.
OBJECTIVE
This study analyzed the potential association between shift work and ischemic stroke.


METHODS
The analysis was carried out using a nested case-control study consisting of 138 shift workers and 469 day workers from the register of the Northern Sweden Monitoring of Trends and Determinants in Cardiovascular Diseases (MONICA) study and the Västerbotten Intervention Programme. Logistic regression analysis was used to analyze the risk estimate for day workers in a comparison with shift workers and the risk of ischemic stroke.


RESULTS
The crude odds ratio for shift workers' risk of experiencing an ischemic stroke was 1.0 (95% confidence interval 0.6-1.8) for both the men and the women. The risk estimates were consistent despite the introduction of several recognized risk factors for ischemic stroke in the logistic regression models.


CONCLUSIONS
In the present study, none of the findings indicated a higher risk of shift workers undergoing an ischemic stroke than day workers.
Hermansson
Jonas
J
Department of Health Sciences, Mid Sweden University, Sundsvall, Sweden. hermansson-jonas@yahoo.se
Gillander Gådin
Katja
K
Karlsson
Berndt
B
Lindahl
Bernt
B
Stegmayr
Birgitta
B
Knutsson
Anders
A
D000328:Adult; D000368:Aged; D002545:Brain Ischemia / Q000453:epidemiology*; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D012307:Risk Factors; D020521:Stroke / Q000453:epidemiology*; D013548:Sweden / Q000453:epidemiology; D014940:Work Schedule Tolerance / Q000502:physiology*