© 2000 Evidence-Based Medicine
Review: high levels of homocysteine are associated with an increased risk for cardiovascular disease
Eikelboom JW, Lonn E, Genest J Jr, et al.Homocyst(e)ine and cardiovascular disease: a critical review of the epidemiologic evidence.Ann Intern Med 1999 Sep 7;131:36375
QUESTIONS: Are high levels of homocysteine associated with an increased risk for cardiovascular disease? Can levels of homocysteine be decreased by folic acid, either alone or combined with vitamin B-6 or B-12?
Epidemiological studies (randomised controlled trials and cohort, case control, and cross sectional studies) were identified by searching Medline (1965 to January 1999) using the terms coronary heart disease, cerebrovascular disease, peripheral vascular disease, and atherosclerosis combined with the terms homocysteine, B-6, B-12, and folic acid. Bibliographies of relevant studies were also checked.
All prospective and retrospective studies were included if they evaluated >150 patients who were considered to be cases, if they were published after 1995, and if they measured the association between homocysteine levels and cardiovascular disease or the intake of folic acid or vitamins B-6 and B-12.
Data were extracted on study design and setting; patient selection criteria, characteristics, and outcomes; homocysteine levels; and use of folic acid and vitamins B-6 and B-12. Data were not combined because of study dissimilarities.
Cross sectional and case-control studies showed an association between plasma homocysteine levels and carotid disease (5 studies),
Stanford University San Jose, California, USA
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