Plasma homocysteine as a risk factor for dementia and Alzheimer's disease

Sudha Seshadri, Alexa Beiser, Jacob Selhub, Paul F. Jacques, Irwin H. Rosenberg, Ralph B. D'Agostino, Peter W.F. Wilson, Philip A. Wolf

Resultado de la investigación: Articlerevisión exhaustiva

1254 Citas (Scopus)


Background: In cross-sectional studies, elevated plasma homocysteine levels have been associated with poor cognition and dementia. Studies of newly diagnosed dementia are required in order to establish whether the elevated homocysteine levels precede the onset of dementia or result from dementiarelated nutritional and vitamin deficiencies. Methods: A total of 1092 subjects without dementia (667 women and 425 men; mean age, 76 years) from the Framingham Study constituted our study sample. We examined the relation of the plasma total homocysteine level measured at base line and that measured eight years earlier to the risk of newly diagnosed dementia on follow-up. We used multivariable proportional-hazards regression to adjust for age, sex, apolipoprotein E genotype, vascular risk factors other than homocysteine, and plasma levels of folate and vitamins B12 and B6. Results: Over a median follow-up period of eight years, dementia developed in 111 subjects, including 83 given a diagnosis of Alzheimer's disease. The multivariable-adjusted relative risk of dementia was 1.4 (95 percent confidence interval, 1.1 to 1.9) for each increase of 1 SID in the log-transformed homocysteine value either at base line or eight years earlier. The relative risk of Alzheimer's disease was 1.8 (95 percent confidence interval, 1.3 to 2.5) per increase of 1 SD at base line and 1.6 (95 percent confidence interval, 1.2 to 2.1) per increase of 1 SD eight years before base line. With a plasma homocysteine level greater than 14 μmol per liter, the risk of Alzheimer's disease nearly doubled. Conclusions: An increased plasma homocysteine level is a strong, independent risk factor for the development of dementia and Alzheimer's disease.

Idioma originalEnglish (US)
Páginas (desde-hasta)476-483
Número de páginas8
PublicaciónNew England Journal of Medicine
EstadoPublished - feb 14 2002
Publicado de forma externa

ASJC Scopus subject areas

  • Medicine(all)


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