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Int J Cardiol:非VKA口服抗凝剂在一定TTR阈值内相比华法林对卒中有更优疗效

2017-06-04 MedSci MedSci原创

华法林对房颤(AF)患者中风预防的疗效和安全性取决于治疗范围(TTR)(国际标准化比例(INR)为2.0-3.0)的时间。近日International Journal of Cardiology发表了一篇针对不同药物在中风预防疗效方面的研究。这项荟萃分析的研究重点是评估非VKA口服抗凝剂(NOAC)与华法林在不同中位TTR(cTTR)阈值下的相对疗效和安全性。

华法林预防房颤(AF)患者中风的疗效和安全性取决于治疗范围(TTR)(国际标准化比例(INR)为2.0-3.0)的时间。近日International Journal of Cardiology发表了一篇针对不同药物在中风预防疗效方面的研究。这项荟萃分析的研究重点是评估非VKA口服抗凝剂(NOAC)与华法林在不同中位TTR(cTTR)阈值下的相对疗效和安全性。

研究过程中,实验员搜索了PubMed,Embase,CENTRAL和监管机构的网站,以便将研究限制在随机化的3期试验中。试验的主要观测指标为中风或全身性栓塞(SSE)以及主要或非主要临床相关性(NMCR)的出血事件。随后,使用随机效应模型根据cTTR的不同阈值对结果进行累积效应,再进行评估分析。

在四项共有71,222例患者的TTR次级研究中,经过试验得出结果数据如下:在cTTR <60%(HR 0.79,95%CI 0.68-0.90)、cTTR在60%-70%(0.82,0.71-0.95)时,NOAC在减少SSE方面的效果明显高于华法林;在cTTR≥70%(1.00,0.82-1.23)时该效果不明显。其中,该效果在cTTR <70%和≥70%时具有显着的相互作用(p = 0.042)。所有亚组患者中,使用NOAC与华法林相比,主要或NMCR出血风险显着降低(cTTR <60%患者为0.67,0.54-0.83,在60%至70%为0.75,0.63-0.89)。同样,cTTR≥70%(HR 0.84,0.64-1.11)时没有相应的疗效,但是cTTR <70%或≥70%时其相互作用无统计学意义(p = 0.271)。

因此,实验人员最终得出的结论是:当cTTR阈值大于70%时,NOAC相比华法林对卒中预防的疗效优势消失,但相对安全性不受INR控制中心质量的改变。

原始出处:


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    2018-01-15 zhwj
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    2017-10-11 pps20019
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    2017-06-06 qjddjq

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