National registry-based case-control study: comorbidity and stroke in young adults

Area of Science:

• Neurology
• Public Health
• Epidemiology

Background:

• Stroke disproportionately affects young adults with chronic diseases.
• Limited understanding of comorbidity's impact on stroke in younger populations.
• Need to compare comorbidity prevalence in young stroke patients versus controls.

Purpose of the Study:

• To investigate the association between comorbidity and stroke in young adults (aged 15-44).
• To compare comorbidity prevalence in young stroke patients against age- and sex-matched controls.

Main Methods:

• Utilized a nationwide cohort from the Swedish Stroke Register (2001-2009).
• Included age- and sex-matched controls from the Swedish Population Register.
• Analyzed discharge diagnoses using the International Classification of Diseases 10th revision (ICD-10) and multivariable logistic regression.

Main Results:

• Vascular risk factors (hypertension, dyslipidemia, diabetes) were more prevalent in stroke patients.
• Eight ICD-10 chapters (neoplasms, blood, endocrine, psychiatric, nervous, eye, circulatory, symptoms) showed independent associations with stroke.
• Stroke risk increased by 26% for each additional diagnosed ICD-10 chapter.

Conclusions:

• Comorbidity, beyond vascular risk factors, is linked to an elevated stroke risk in young individuals.
• The number of diagnosed comorbidities directly correlates with increased stroke risk.
• Highlights the importance of managing overall health in preventing stroke among young adults.