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An association between plasma homocysteine concentrations and ischemic stroke in elderly Japanese
Ryuichi Kawamoto1, Takeshi Kajiwara, Yuichiro Oka
1Department of Internal Medicine, Nomura Municipal Hospital, Ehime, Japan. rykawamo@ehime.med.or.jp
Insights
Elevated plasma homocysteine levels are linked to an increased risk of ischemic stroke in elderly Japanese individuals. This finding supports previous research in Western populations, highlighting homocysteine as a significant risk factor.
Area of Science:
- Neurology
- Cardiovascular Science
- Clinical Chemistry
Background:
- Ischemic stroke is a leading cause of disability and mortality.
- Atherosclerosis is a primary risk factor for ischemic stroke.
- Plasma homocysteine is a recognized risk factor for atherosclerosis and cardiovascular events.
Purpose of the Study:
- To investigate the association between plasma homocysteine concentrations and ischemic stroke.
- To determine if this association holds true in an elderly Japanese population.
Main Methods:
- A case-control study involving 91 elderly Japanese in-patients.
- Plasma homocysteine levels were measured using high-performance liquid chromatography.
- Logistic regression analysis was used to adjust for other risk factors.
Main Results:
- Patients with ischemic stroke had significantly higher plasma homocysteine levels.
- Odds ratios for ischemic stroke increased with higher homocysteine concentrations.
- Adjusted analysis confirmed a significant association between elevated homocysteine and ischemic stroke risk.
Conclusions:
- Elevated plasma homocysteine is a significant risk factor for ischemic stroke in the elderly Japanese.
- The findings corroborate the association observed in Western populations.
- Plasma homocysteine measurement may aid in stroke risk assessment.
Abstract:
The present study was performed to clarify the relation between plasma homocysteine and ischemic stroke. We studied the relationship between ischemic stroke and the known risk factors for atherosclerosis including plasma homocysteine in 91 in-patients (80.3 +/- 6.8 years) in a medical ward. Those diagnosed with transient ischemic attack, cerebral infarction were placed in the disease group. Blood was drawn from in-patients in a fasting state for determination of plasma homocysteine. Plasma homocysteine concentrations were determined using a high-performance liquid chromatography assay. The odds ratio of ischemic stroke was higher in the second (10.0-13.9 micromol/l) and third highest plasma homocysteine concentration groups (> or = 14.0 micromol/l) than in the first group (< 10.0 micromol/l) by 5.18 and 4.42-fold, respectively. Logistic regression analysis using ischemic stroke as an object variable, adjusted by various risk factors including the plasma homocysteine concentration showed that the odds ratio on combining the second and third groups was 5.80 (95% confidence interval (Cl): 1.50-22.5) compared with the first group. The findings confirmed that the association between plasma homocysteine concentration and ischemic stroke in Western populations is also present among the elderly Japanese.
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