D-二聚体水平在初诊弥漫大B细胞淋巴瘤患者预后评估中的价值

目的探讨D-二聚体水平在弥漫大B细胞淋巴瘤(DLBCL)患者中的预后意义。方法回顾性分析2015年1月至2019年6月天津市人民医院收治的70例初诊DLBCL患者的临床资料,根据受试者工作特征(ROC)曲线确定D-二聚体判断患者生存的最佳截断值,并将患者分组。比较不同D-二聚体水平患者间凝血相关指标及临床病理特征差异;采用Kaplan-Meier法对总生存(OS)进行单因素分析,采用Cox回归模型进行OS多因素分析。结果根据ROC曲线,D-二聚体判断患者生存的最佳截断值为0.75 mg/L。D-二聚体≥0.75 mg/L组(36例)和<0.75 mg/L组(34例)中不同临床分期、国际预后指数评分、乳酸脱氢酶水平的患者比例比较,差异均有统计学意义(均P<0.05);血浆凝血酶原时间分别为(13.5±0.9)s和(13.0±0.8)s,活化部分凝血活酶时间分别为(37±5)s和(34±6)s,差异均有统计学意义(均P<0.05)。单因素生存分析显示,Ann Arbor分期Ⅲ~Ⅳ期、国际预后指数评分>2分、乳酸脱氢酶水平>240 U/L、有B症状、D-二聚体水平≥0.75 mg/L DLBCL患者5年OS率均降低(均P<0.05)。多因素Cox回归分析显示,D-二聚体≥0.75 mg/L为DLBCL患者OS独立危险因素(HR=0.368,95%CI 0.144~0.944,P=0.038)。结论D-二聚体水平可作为判断DLBCL患者预后的临床指标,D-二聚体水平高患者预后不良。

Prognostic value of D-dimer level in patients with newly diagnosed diffuse large B-cell lymphoma

Objective:To investigate the prognostic significance of D-dimer level in patients with diffuse large B-cell lymphoma (DLBCL).Methods:The clinical data of 70 newly diagnosed DLBCL patients who were admitted to Tianjin People's Hospital from January 2015 to June 2019 were retrospectively analyzed. The optimal cut-off value of D-dimer for survival was determined according to the receiver operating characteristic (ROC) curve, and the patients were grouped. The differences of coagulation related indexes and clinicopathological features between patients with different D-dimer levels were compared. Kaplan-Meier method was used for univariate analysis of overall survival (OS), and Cox regression model was used for multivariate analysis of OS.Results:According to ROC curve, the best cut-off value of D-dimer for survival was 0.75 mg/L. The proportion of patients with different clinical staging, international prognostic index score, lactate dehydrogenase level had statistically significant differences between the D-dimer ≥0.75 mg/L group (36 cases) and <0.75 mg/L group (34 cases) (all P < 0.05). The prothrombin time of D-dimer ≥ 0.75 mg/L group and < 0.75 mg/L group were (13.5±0.9) s and (13.0±0.8) s, respectively, and the activated partial thromboplastin time were (37±5) s and (34±6) s, respectively,and the differences were statistically significant (all P < 0.05). Univariate analysis showed that the 5-year OS rates of DLBCL patients with Ann Arbor stage Ⅲ-Ⅳ, international prognostic index score > 2, lactate dehydrogenase level > 240 U/L, B symptoms, D-dimer level ≥0.75 mg/L were decreased (all P < 0.05). Multivariate Cox regression analysis showed that D-dimer ≥0.75 mg/L was an independent risk factor for OS of DLBCL patients ( HR=0.368, 95% CI 0.144-0.944, P= 0.038). Conclusion:The level of D-dimer can be used as a clinical indicator to judge the prognosis of DLBCL patients, and the prognosis of patients with high D-dimer level is poor.