Assessment of coronary heart disease risk by combined analysis of coagulation factors
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Nena Aleksic1, Yao-Wei W Wang, Chul Ahn
1Department of Internal Medicine at Medical School, Vascular Biology Research Center at Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, TX 77030, USA. nevenka.matijevic-aleksic@uth.tmc.edu
Insights
Soluble thrombomodulin (sTM) interacts with fibrinogen, influencing coronary heart disease (CHD) risk. Combined analysis of these coagulation factors improves CHD risk assessment.
Area of Science:
- Cardiovascular Medicine
- Hematology
- Epidemiology
Background:
- Coagulation factors are linked to coronary heart disease (CHD) risk.
- The interaction between these factors and CHD risk is not well understood.
Purpose of the Study:
- To investigate interactions between soluble thrombomodulin (sTM) and other coagulation factors (fibrinogen, factor VIII, FVII, PAI-1) in relation to CHD risk.
- To determine if combined analysis of these factors improves CHD risk prediction.
Main Methods:
- Prospective case-cohort study design.
- Cox proportional hazard regression analysis.
- Analysis of interactions between sTM and fibrinogen, FVIII, FVII, and PAI-1 in 410 CHD cases and 721 non-cases from the ARIC study.
Main Results:
- A significant interaction was found between sTM and fibrinogen (p=0.027).
- High sTM levels counteracted CHD risk from high fibrinogen, while low sTM amplified it.
- FVIII and PAI-1 showed positive associations with CHD risk in the context of low sTM.
Conclusions:
- Complex interactions exist between sTM and prothrombotic coagulation factors.
- Combined analysis of sTM and coagulation factors enhances CHD risk assessment.
Objective:
Prospective studies have reported a positive association of coagulation factors with risk of coronary heart disease (CHD). It is unclear whether these coagulation factors interact.
Methods And Results:
Using a prospective case-cohort design, we analyzed by Cox proportional hazard regression interactions between soluble thrombomodulin (sTM) and fibrinogen, factor VIII (FVIII), FVII, or plasminogen activator inhibitor-1 (PAI-1) in 410 CHD cases and 721 non-cases from the Atherosclerosis Risk in Communities (ARIC). There was a significant interaction between sTM and fibrinogen (p=0.027). We next assessed risk ratios (RR) by combined tertile analysis. Combined analysis revealed that being in the upper sTM tertile counteracted the CHD risk imposed by higher fibrinogen whereas being in the lower sTM tertile amplified the CHD risk of higher fibrinogen. sTM and fibrinogen mutually influenced CHD incidence in a concentration-dependent manner. When analyzed as single factors by tertiles, FVIII, FVII and PAI-1 were not associated with CHD. However, when analyzed together with sTM, FVIII and PAI-1 were both positively associated with CHD for those in the lower sTM tertile.
Conclusion:
There is a complex interaction between sTM and prothrombotic coagulation factors. Combined analysis improves CHD risk assessment.
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