Circulation:高心血管疾病风险患者的LDL-C应降至什么水平?

2021-03-18 MedSci原创 MedSci原创

高心血管疾病风险患者的LDL-C应降至什么水平?

最新的国际指南降低了严重不良血管疾病(MACE)高风险患者的低密度脂蛋白胆固醇(LDL-C)的推荐目标水平。但是,将LDL-C降至常规目标水平之下是否还能带来额外的效益仍不确定。由于既往患者经降脂治疗后达到较低LDL-C或较高LDL-C水平时,还存在其他不同的影响MACE的特征性预后因素,此外,很少有患者达到极低的LDL-C水平,导致相关分析的参考价值有限。

为了克服上述限制,研究人员对ODYSSEY OUTCOMES试验进行了倾向得分匹配分析。ODYSSEY OUTCOMES试验在18924位采用强化或最大耐受剂量的他汀药物治疗的急性冠脉综合征患者中对比了alirocumab和安慰剂的降脂作用。

接受alirocumab治疗的患者进行分层,预计治疗4个月时达到不同的LDL-C水平:<25 (n=3357)、25~50 (n=3692)或>50 mg/dL (n=2197)。治疗4个月后,将每层患者和具有相似基线特征的接受安慰剂的患者进行对比。

在alirocumab治疗组达到预定LDL-C水平层的患者中,基线LDL-C、脂蛋白(a)、强化他汀疗法的使用、研究药物依从性和其他人口统计特征、医疗史、生物识别和实验室标准均有所差异。经过倾向得分匹配后,alirocumab组和安慰剂组的患者的相应特征相似。

LDL-C水平的降低情况

LDL-C水平降至25 mg/dL以下或降至25~50 mg/dL之间的患者的MACE治疗风险比和绝对风险降低幅度相近(风险比均为0.74,绝对风险分别降低了0.92和1.05)。LDL-C水平仍在50 mg/dL之上的患者的药物依从性较差,从治疗中的获益较少(风险比 0.87,绝对风险降低0.62)。未发生与LDL-C限制水平(<15 mg/dL)相关的安全性问题。

MACE发生率

将基线特征和依从性差异纳入分析后,采用alirocumab治疗患者,LDL-C水平降至25 mg/dL以下时的MACE风险降低程度与LDL-C水平降至25~50 mg/dL之间的患者的相近

原始出处:

Gregory G. Schwartz, et al. Clinical Efficacy and Safety of Alirocumab After Acute Coronary Syndrome According to Achieved Level of Low-Density Lipoprotein Cholesterol. Circulation. 2021;143:1109–1122

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    2021-04-04 gr

    非常好

    0

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    2021-03-20 zhwj
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    2021-03-18 jyzxjiangqin

    好文章!

    0

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