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JAMA:总颈动脉内膜厚度对心血管长期风险预测无临床价值

2012-09-07 丁香园 丁香园

    目前,医学界对颈总动脉壁内膜中层厚度(CIMT)可改善对心血管事件绝对风险预测值的证据还存在争论。为了明确Framingham风险评估系统中添加总CIMT指标是否能够增加首次心肌梗塞,卒中的10年风险预测价值,荷兰Utrecht大学医学中心的Hester M. Den Ruijter博士等人对此进行了大样本荟萃分析,结果显示,Framingham风险评分系统添

    目前,医学界对颈总动脉壁内膜中层厚度(CIMT)可改善对心血管事件绝对风险预测值的证据还存在争论。为了明确Framingham风险评估系统中添加总CIMT指标是否能够增加首次心肌梗塞,卒中的10年风险预测价值,荷兰Utrecht大学医学中心的Hester M. Den Ruijter博士等人对此进行了大样本荟萃分析,结果显示,Framingham风险评分系统添加总CIMT测量后虽然对首发心肌梗塞或卒中的10年风险预测价值有小的改善,但不具备临床意义。相关论文发表于国际权威杂志JAMA 2012年8月24日在线版上。

    研究人员对数据库(1950至2012年6月的PubMed记录及1980至2012年6月的EMBASE数据库)进行了相关文献的检索鉴定,并进行专家评审。文献检索的标准包括:有一般人群受试者入组,试验中对基线总CIMT值进行记录,受试者随访至第一次心肌梗塞或卒中等。研究者将受试者个人数据纳入1数据集,并对不存在心血管疾病的个人进行受试者个人数据meta-分析。

    结果显示,研究者共纳入了14项基于人群的队列,共得到45 828例受试者数据。中位随访期为11年,共发生了4007例首次心肌梗塞或卒中。研究者首次更改了Framingham风险评分体系的风险分子,加入总CIMT测量指标构建新的模型,并以新旧两种模型分别对首发心肌梗塞或卒中的10年绝对风险值进行预测。研究者发现两种模型的C统计量相似(0.757; 95% CI, 0.749-0.764; 以及0.759; 95% CI, 0.752-0.766)。添加总CIMT指标后的再分级效果改善值有限(0.8%; 95% CI, 0.1%-1.6%)。研究人员观察到,对于所有中危受试人群而言,重新分级净改善值为3.6%(95% CI, 2.7%-4.6%),并且男性与女性之间无差异。

    研究人员由此得出结论,Framingham风险评分系统添加总CIMT测量后虽然对首次心肌梗塞或卒中的10年风险预测价值有小的改善,但不具备临床意义。

链接:

Den Ruijter HM Peters SA Anderson TJ Britton AR Dekker JM Eijkemans MJ Engström G Evans GW de Graaf J Grobbee DE Hedblad B Hofman A Holewijn S Ikeda A Kavousi M Kitagawa K Kitamura A Koffijberg H Lonn EM Lorenz MW Mathiesen EB Nijpels G Okazaki S O'Leary DH Polak JF Price JF Robertson C Rembold CM Rosvall M Rundek T Salonen JT Sitzer M Stehouwer CD Witteman JC Moons KG Bots ML.Common carotid intima-media thickness measurements in cardiovascular risk prediction: a meta-analysis.JAMA 2012 308 8 :796-803

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