CLIN CHEM:随访的时间越长,越好吗?心脏病患者队列中衰减生物标记物相关性的程度和机制的实证研究

2017-03-23 MedSci MedSci原创

识别心血管病患者的新的风险标志仍然是研究的重点。在这样的研究中,通常认为较长的随访是有利的,但是随着随访的增加,所关注的标志物相关性可能会减弱。在病人队列研究的背景下,这个问题尚未得到充分的解决。本研究分析了心血管病人队列中的衰减相关性的程度和机制。

最近,来自德国癌症研究中心临床流行病学和衰老研究所的研究团队报道了关于心脏病患者队列中衰减生物标记物相关性的程度和机制的一项前瞻性实证研究, 相关研究刊登于国际权威杂志CLIN CHEM上。

研究认为,识别血管病患者的新的风险标志仍然是研究的重点。在这样的研究中,通常认为较长的随访是有利的,但是随着随访的增加,所关注的标志物相关性可能会减弱。在病人队列研究的背景下,这个问题尚未得到充分的解决。本研究分析了血管病人队列中的衰减相关性的程度和机制。

在一项包括急性冠脉综合征(ACS)和心脏搭桥手术后参加住院康复计划的1204例患者的前瞻性队列研究中,通过多个Cox回归估计了多种生物标志物与全因死亡率的相关性。危险比率是根据整个随访期(13年)和以前随访时间(3,4,5,6,8,10年)截断后估计的。

研究发现,对于大多数标志物,随着随访持续时间的增加,可以观察到明显的且有时非常显著的减弱风险比。差异损耗通常不是对这种现象的充分解释,而进一步的分析显示出了一些标记的反向因果关系的作用。效率分析表明,在存在实际衰减量的情况下,随访持续时间和统计效率的关系可能不同于常规认识。

研究表明,对患者队列中衰减相关性估计比实际上所认为的更为重要和复杂。这对于预的设计和预后解释以及病因学研究具有重要意义,这些研究可能更适用于在有初始急性事件的患者队列的情况下。

原始出处:

Lutz P. Breitling, Ute Mons, Harry Hahmann.et.al. The Longer,the Better? An Empirical Study of the Extent and Mechanisms of Attenuating Biomarker Associations in Cardiovascular Patient Cohorts. DOI:10.1373/clinchem.2016.263202 Published February 2017

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    2018-02-09 wjywjy
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