Key result
The incidence of aneurysmal subarachnoid hemorrhage in Norway decreased from 11.1 per 100,000 person-years in 1999-2001 to 8.9 per 100,000 person-years in 2005-2007 (P<0.001).
Population
Patients with aneurysmal subarachnoid hemorrhage in Norway between 1999 and 2007
Design
Cohort
Follow-up
1999-2007
Authors
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Declining aneurysmal subarachnoid hemorrhage incidence in Norway warrants ongoing surveillance; leaves open drivers and generalizability beyond this cohort.
Observational
Yes
Absolute Event Rate: 8.9% vs 11.1%
p-value: p=<0.001
The incidence of aneurysmal subarachnoid hemorrhage in Norway decreased significantly between 1999 and 2007, with higher rates observed in women and in northern regions.
Lindekleiv et al. (2010) conducted an observational in Aneurysmal subarachnoid hemorrhage. Time period (2005-2007) vs. Time period (1999-2001) was evaluated on Annual incidence of aneurysmal subarachnoid hemorrhage per 100,000 person years (p=<0.001). The incidence of aneurysmal subarachnoid hemorrhage in Norway decreased from 11.1 per 100,000 person-years in 1999-2001 to 8.9 per 100,000 person-years in 2005-2007 (P<0.001).
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