Objective: To investigate the diagnostic and prognostic value of D-dimer level in patients with hepatitis B-related acute-on-chronic liver failure (HBV-ACLF). Methods: A total of 142 cases diagnosed with ACLF were randomly selected as research objects in the open cohort using the Chinese Group on the Study of Severe Hepatitis B-ACLF (COSSH-ACLF). Plasma D-dimer levels were compared between patients with ACLF and non-ACLF and patients with different ACLF grades. Survival and death group D-dimer levels were compared with the end points of 28 days and 90 days, respectively. The correlation between D-dimer and other laboratory indicators and prognostic scores were investigated. Area under receiver operating characteristic curve (AUROC) was used to evaluate the D-dimer value for predicting the prognosis of ACLF patients. 125 external ACLF cases were used for validation. A Student t test or Mann-Whitney U test was used to compare continuous measurement data between two groups. Kruskal-Wallis test was used to compare continuous measurement data between multiple groups. Results: Plasma D-dimer levels in the ACLF [2 588.5 (1 142.8, 5 472.8) μg/L] ] and non-ACLF group [1 385.5 (612.0, 3 840.3) μg/L] had a significant difference (P<0.001). ACLF-3 patients had significantly higher D-dimer levels than ACLF-1/2 patients (ACLF-3 vs. ACLF-1, P<0.001; ACLF-3 vs. ACLF-2, P<0.05). Patients who died at 28/90 days had significantly higher D-dimer levels than those whom survived (P<0.001). There was a significant positive correlation between D-dimer level with prothrombin time (PT), international normalized ratio (INR), high-density lipoprotein C, as well as various prognostic scores (COSSH-ACLFs, CLIF-C ACLFs, CLIF-OFs, MELDs). AUROC of D-dimer in predicting the prognosis of ACLF patients at 28 days and 90 days was 0.751 (95% CI: 0.649-0.852) and 0.787 (95% CI: 0.695-0.878), respectively, which did not differ significantly compared with the predictive ability of other scores (P<0.05), and similar results were confirmed by an external validation group of 125 cases. Conclusion: D-dimer level is significantly higher in patients with ACLF, so it is an independent predictor of prognosis at 28 and 90 days.
目的： 探讨D-二聚体水平对乙型肝炎相关的慢加急性肝衰竭（HBV-ACLF）患者诊断和预测预后的价值。 方法： 利用HBV-ACLF诊断中国标准研究（COSSH-ACLF）开放队列，随机纳入142例ACLF患者为研究对象，比较ACLF患者和非ACLF患者，不同ACLF等级患者血浆D-二聚体水平，并分别以28 d和90 d为终点比较生存组和病死组患者的D-二聚体水平；研究D-二聚体和其他实验室指标以及预后评分之间的相关性；通过受试者操作特征曲线下面积（AUROC）评估D-二聚体预测ACLF患者预后的价值。并利用外部125例ACLF患者进行验证。用 Student t 检验或Mann-Whitney U检验比较两组间的连续计量数据，用Kruskal-Wallis检验比较多组间的连续计量数据。 结果： ACLF组中血浆D-二聚体水平［2 588.5（1 142.8，5472.8）μg/L］与非ACLF组中的［1 385.5（612.0，3 840.3）μg/L］差异有统计学意义（P<0.001）。ACLF-3级患者的D-二聚体水平明显高于ACLF-1/2级（ACLF-3对比ACLF-1，P<0.001；ACLF-3对比ACLF-2，P<0.05）。28/90 d病死患者的D-二聚体水平显著高于生存组的患者（P<0.001）。D-二聚体水平与凝血酶原时间、国际标准化比值、高密度脂蛋白C等指标以及各项预后评分（COSSH-ACLFs、CLIF-C ACLFs、CLIF-OFs、MELDs）呈显著正相关。D-二聚体预测ACLF患者28 d和90 d预后的AUROC分别为0.751（95%可信区间：0.649～0.852）和0.787（95%可信区间：0.695～0.878），与其他评分的预测能力相比，差异无统计学意义（P>0.05）。125例外部验证组验证了类似结果。 结论： D-二聚体水平在ACLF患者中显著增高，同时是影响ACLF患者28 d和90 d预后的独立预测因素。.