Circ Cardiovasc Qual:大型心血管随机临床试验使用复合终点的时间趋势

2017-11-28 何娜 环球医学

2017年10月,加拿大科学家在《Circ Cardiovasc Qual Outcomes》发文,考察了著名医学期刊中,大型心血管随机临床试验中复合终点使用的时间趋势。

2017年10月,加拿大科学家在《Circ Cardiovasc Qual Outcomes》发文,考察了著名医学期刊中,大型心血管随机临床试验中复合终点使用的时间趋势。

背景:过去50年里,心血管死亡率有所降低,这使得在随机临床试验中证明新疗法显着获益的难度增加。研究者旨在确定大型心血管试验中,复合终点的使用是否随时间而变化,并考察这些复合终点个体组成部分的临床重要性的时间趋势。

方法和结果:使用已经证实的检索策略,研究者检索了MEDLINE数据库中,于1986年至2015年期间,发表于《New England Journal of Medicine》、《The Lancet》和《Journal of the American Medical Association》的关于一级或二级心血管预防治疗的随机试验。研究者对研究的人口统计学特征、干预类型,以及主要和次要结局进行提取和分类。根据重要性(轻微、中度、重大、严重和死亡)和分析的时间趋势,对复合终点构成进行分级。共检索到2607项试验,其中604项符合纳入标准。复合终点的使用率从1986年至1990年的18.8%显着增加至2011年至2015年的83.0%(P<0.001)。主要终点的构成数量也显着增加(1986~1990 中位1,2011~2015 中位3;P<0.001)。当代试验更有可能纳入对于患者而言没那么重要的终点(1986~1990 轻微3.1% 中度6.3%,2011~2015 轻微4.5% 中度44.6%;P<0.001)。死亡作为首要单一终点的使用随时间显着降低(1986~1990 53.1%,2011~2015 17.9%;P<0.001)。

结论:当代心血管随机临床试验更可能使用含有更多组成部分的主要复合终点。此外,这些复合终点越来越多地包含了临床不太重要的构成部分。解读随机试验结果的临床医师和政策制定者应该认识到,复合终点中个体组成部分的显着性常常具有异质性。

原始出处:
Tan NS, Ali SH, Lebovic G, et al.Temporal Trends in Use of Composite End Points in Major Cardiovascular Randomized Clinical Trials in Prominent Medical Journals.Circ Cardiovasc Qual Outcomes. 2017 Oct;10(10). pii: e003753. doi: 10.1161/CIRCOUTCOMES.117.003753.

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