Abstract:
Objective
To study on the relativity between the Caprini thrombosis risk score and nine plasma thrombosis markers in hospitalized patients and to estimate the value of these methods in the risk assessment of venous thromboembolism (VTE).
Methods
One thousand and sixty-six hospitalized patients were selected from the Tianjin Medical University General Hospital from the 2009 to 2012 for retrospective cohort study, including 685 males and 381 females whose, age were 19-81 years. The level of von Willebrand factor antigen (vWF:Ag), factor Ⅶ activity (FⅦ:A), factor Ⅷ activity (FⅧ:A), antithrombin activity (AT:A), protein C activity (PC:A), free protein S antigen (FPS:Ag), plasminogen activator inhibitor activity (PAI:A), tissue plasminogen activator activity (t-PA:A) and D-dimer (D-D) were determined with IL ACL TOP 700 coagulation analyzer, Sysmex CA7000 coagulation analyzer and the Biomerieux Vidas fluor-euzymelinked immunoassay analyzer assay. The receiver operating characteristic curve (ROC) to analyze the diagnosis performance of the biomarkers were calulated. The correlation between the level of markers and the Caprini score in patients was assessed using Spearman correlation analysis. Kaplan-Meier curve analysis was peformed to determine the survival aralysis.
Results
There was significant difference with level of thrombosis markers among all Caprini risk stratification groups H value of (D-D, t-PA:A and PAI:A was 7.530, 3.221, 4.974, respectively; F value of vWF:Ag, FⅦ:A, FⅧ:A, PC:A, FPS:A, AT:A was 6.395, 3.887, 4.062, 2.905, 3.218, 5.469, respectively, P<0.01).There was positive correlation between the plasma thrombosis markers and Caprini score (r value was D-D 0.805,vWF:Ag 0.781, FⅦ:A 0.433, FⅧ:A 0.509, FPS:Ag -0.244, AT:A -0.496, t-PA:A -0.263, PAI:A 0.692,respectively,P<0.01 or 0.05). The ROC analysis indicated the diagnostic efficiency of D-D and vWF:Ag was better than the other markers in extreme high risk and VTE risk (the sensitivity and specificity of D-D was 82.1% and 53.9%,94.7% and 51.7%, respectively; vWF:Ag was 71.4% and 60.9%, 81.3% and 61.0%, respectively). There was higher cumulative risk of VTE within 30 d for patients with extreme high risk group and D-D level exceeded the cut-off(1024 μg/L) group (Log-rank χ2 was 65.092 and 20.785 respectively, P=0.000).
Conclusions
There is a strong relationship between the 9 thrombosis markers and the caprini risk stratification. The diagnostic efficiency of D-D is superior to other 8 markers in VTE risk and Caprini extreme high risk. Plasma thrombsis markers could reflect the insidious coagulation disorder, the plasma markers and Caprini model can further increase the diagnostic value in clinical application.
Key words:
Caprini risk model,
Venous thromboembolism,
Thrombosis marker
Jianlong Men, Jing Ren, Lixia Dong, Zhuhua Yao, Wen Zhao, Bo Hou. Study on the relativity between the Caprini risk model and 9 thrombosis risk markers in diagnosis with venous thromboembolism[J]. Chinese Journal of Clinical Laboratory Management(Electronic Edition), 2014, 02(01): 45-50.