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ISSN 1001-5256 (Print)
ISSN 2097-3497 (Online)
CN 22-1108/R
Volume 37 Issue 1
Jan.  2021
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Article Navigation >  Journal of Clinical Hepatology  > 2021  >  37(1): 63-67

Risk factors of portal vein thrombosis in cirrhotic patients with esophageal varices

DOI: 10.3969/j.issn.1001-5256.2021.01.013
  • 1.

    Department of Gastroenterology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250021, China

  • 2.

    Department of Special Clinical Laboratory, Shandong Police Hospital, Jinan 250002, China

  • 3.

    Department of Gastroenterology, Provincial Hospital Affiliated to Shandong First Medical University, Jinan 250021, China

  • Received Date: 2020-08-02
  • Accepted Date: 2020-08-31
  • Published Date: 2021-01-20
    Abstract
  •   Objective  To investigate the risk factors for portal vein thrombosis (PVT) in cirrhotic patients with esophageal varices, and to establish a nomogram for predicting the risk of PVT.  Methods  A retrospective analysis was performed for the clinical data of 283 cirrhotic patients with esophageal varices who attended Shandong Provincial Hospital Affiliated to Shandong University from December 2013 to December 2018, and according to imaging findings, the patients were divided into PVT group with 119 patients and non-PVT group with 164 patients. The t-test or the Mann-Whitney U test was used for comparison of continuous data between two groups, and the chi-square test was used for comparison of categorical data between two groups. A multivariate logistic regression analysis was used to screen out independent risk factors; a nomogram was established and validated based on the results of the multivariate logistic regression analysis, and C-index and calibration curve were used to evaluate its performance.  Results  The univariate analysis showed that compared with the non-PVT group, the PVT group had significantly higher Child-Pugh class (χ2=9.388, P=0.009), proportion of patients with a history of splenectomy (χ2=26.805, P < 0.001), white blood cell count (Z=-2.248, P=0.025), platelet count (Z=-3.323, P=0.001), D-dimer(Z=-6.236, P < 0.001), and spleen thickness (Z=-2.432, P=0.015) and a significantly lower level of triglyceride (TG) (Z=-4.150, P < 0.001). The multivariate logistic regression analysis showed that a reduction in TG (odds ratio [OR]=0.441, 95% confidence interval [CI]: 0.190-0.889), an increase in D-dimer (OR=1.151, 95%CI: 1.041-1.272), prolonged prothrombin time (PT) (OR=1.160, 95%CI: 1.025-1.313), and a history of splenectomy (OR=2.933, 95%CI: 1.164-7.389) were independent risk factors for PVT in cirrhotic patients with esophageal varices. In addition, a nomogram was established based on the results of the multivariate regression analysis, with a C-index of 0.745, and the calibration curve showed good consistency between the observed and predicted values for the development of PVT.  Conclusion  A reduction in TG, an increase in D-dimer, prolonged PT, and a history of splenectomy are independent risk factors for PVT in cirrhotic patients with esophageal varices, and the nomogram developed based on these results can provide a quantitative and intuitive tool for clinicians to assess the risk of PVT.

     

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