In the era of systematic reviews, does the size of an individual trial still matter.

In the era of systematic reviews, does the size of an individual trial still matter.
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在系统评价的时代,单个试验的规模仍然很重要。

DOI:
10.1371/journal.pmed.0050004
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发表时间:
2008-01-03
期刊:
影响因子:
15.8
通讯作者:
Elbourne, Diana
Elbourne, Diana
中科院分区:
医学1区
文献类型:
--
作者:
Guyatt, Gordon H.;Mills, Edward J.;Elbourne, Diana

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辩论背景:结合多项试验的高质量证据的系统评价现在被广泛认为是临床证据层次的顶层。鉴于系统评价的首要地位,以及个体临床试验很少为临床研究问题提供明确答案的事实,一些评论员质疑个体试验的样本量计算是否仍然重要。其他人指出,小型试验仍然可能具有误导性。
Background to the debate: Systematic reviews that combine high-quality evidence from several trials are now widely considered to be at the top of the hierarchy of clinical evidence. Given the primacy of systematic reviews—and the fact that individual clinical trials rarely provide definitive answers to a clinical research question—some commentators question whether the sample size calculation for an individual trial still matters. Others point out that small trials can still be potentially misleading.
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