Hyperhomocysteinemia and venous thrombosis: a meta-analysis

Thromb Haemost. 1998 Dec;80(6):874-7.


Hyperhomocysteinemia is an established risk factor for atherosclerosis and vascular disease. Until the early nineties the relationship with venous thrombosis was controversial. At this moment ten case-control studies on venous thrombosis are published. We performed a metaanalysis of these reports. We performed a MEDLINE-search from 1984 through June 1997 on the keywords "homocysteine" or "hyperhomocysteinemia" and "venous thrombosis", which yielded ten eligible case-control studies. We found a pooled estimate of the odds ratio of 2.5 (95% CI 1.8-3.5) for a fasting plasma homocysteine concentration above the 95th percentile or mean plus two standard deviations calculated from the distribution of the respective control groups. For the post-methionine increase in homocysteine concentration we found a pooled estimate of 2.6 (95% CI 1.6-4.4). These data from case-control studies support hyperhomocysteinemia as a risk factor for venous thrombosis. Further research should focus on the pathophysiology of this relationship and on the clinical effects of reducing homocysteine levels by vitamin supplementation.

Publication types

  • Meta-Analysis

MeSH terms

  • Adult
  • Case-Control Studies
  • Fasting / blood
  • Female
  • Homocysteine / blood*
  • Humans
  • Male
  • Methionine
  • Middle Aged
  • Odds Ratio
  • Risk Factors
  • Venous Thrombosis / blood
  • Venous Thrombosis / epidemiology*


  • Homocysteine
  • Methionine