Clinical Scorecard: Hospital Admissions for Aneurysmal Subarachnoid Hemorrhage: Incidence and Mortality Rates in Norway from 2008 to 2014
At a Glance
Category
Detail
Condition
Aneurysmal Subarachnoid Hemorrhage (aSAH)
Key Mechanisms
Rupture of intracranial aneurysm causing bleeding into the subarachnoid space; risk influenced by aneurysm size/type, female gender, age, hypertension, smoking, and alcohol abuse
Target Population
Adults aged 18 years and older, more common between 40-60 years
Care Setting
Norwegian public hospitals with free inpatient treatment under the national health care system
Key Highlights
aSAH accounts for approximately 5% of all strokes and has high risk of poor outcome or death
Incidence rates of aSAH in Norway were studied from 2008 to 2014 using national registries with validated diagnosis codes
Modifiable risk factors such as hypertension, smoking, and alcohol abuse remain critical targets for prevention
Guideline-Based Recommendations
Diagnosis
Use ICD-10 codes I60.0–I60.7 to identify aneurysmal SAH; exclude non-aneurysmal SAH codes (I60.8–I60.9) for accurate incidence
Diagnosis confirmed by treating physicians and validated with a confirmation rate of 95.3%
Management
Hospital admission and treatment provided free of charge in public hospitals
Management not influenced by insurance policies due to public healthcare system
Monitoring & Follow-up
Follow patients from admission date until death or study end to assess case fatality at 30, 90, and 365 days
Monitor for hypertension and diabetes mellitus as comorbidities using registry and prescription data
Risks
Higher risk of rupture associated with female gender, older age, aneurysm characteristics, hypertension, smoking, and alcohol abuse
Modifiable risk factors should be addressed to reduce incidence
Patient & Prescribing Data
Patients hospitalized with aSAH in Norway aged 18 years or older
Use of oral antithrombotic medications recorded as dichotomous variable; prescriptions tracked via national prescription database ensuring complete registration
Clinical Best Practices
Utilize national patient and prescription registries for accurate epidemiological surveillance of aSAH
Exclude non-aneurysmal SAH cases to improve precision of incidence estimates
Address modifiable risk factors such as hypertension and smoking in prevention strategies
Ensure timely hospital admission and standardized care in public hospitals
Apply Cox proportional hazards modeling to identify predictors of early mortality post-aSAH
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