[Differences between Spanish ischemic stroke patients and those from Central and Northern Europe. A case-control...

Area of Science:

• Neurology
• Epidemiology
• Vascular Medicine

Background:

• Cerebral vascular pathologies and risk factor prevalence differ across races in American populations.
• Hispanic populations show higher diabetes mellitus rates and lower cardioembolic stroke/extracranial carotid atheromatosis frequencies than white populations.
• Understanding ethnic variations in stroke risk factors and cerebrovascular disease is crucial for targeted prevention.

Purpose of the Study:

• To compare conventional risk factors, ischemic stroke subtypes, and carotid artery disease between Spaniards and Northern Europeans.
• To investigate potential ethnic differences in the etiology of ischemic stroke and transient ischemic attack (TIA).

Main Methods:

• A case-control study design was employed, pairing one case (Central/Northern European) with two controls (Spaniards) by age and sex.
• Participants were hospitalized for ischemic stroke or TIA.
• Conventional risk factors, stroke subtype, and carotid duplex scan results were compared, with odds ratios (OR) and 95% confidence intervals (CI) calculated.

Main Results:

• Arterial hypertension (AHT) was less frequent in Northern Europeans (OR: 0.45; CI: 0.24-0.83).
• No significant differences were observed in diabetes, hypercholesterolemia, heart disease, or atrial fibrillation prevalence.
• Severe carotid stenosis (>70%) was less frequent in Spaniards (13%) compared to Northern Europeans (21.9%).

Conclusions:

• Spaniards exhibit a lower prevalence of arterial hypertension and severe carotid artery disease compared to Northern Europeans.
• Conventional risk factors do not fully explain observed differences in cerebrovascular disease between these groups.
• Future studies should investigate other potential race-linked risk factors like cholesterol subfractions and homocysteine.