Study Design: Randomized controlled trial; Level of evidence, 1.

研究设计: 随机对照试验; 证据水平, 1.

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Study Design: Cost of illness study alongside a randomized controlled trial.

研究设计: 疾病成本研究及随机对照试验.

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Study Design . A randomized controlled trial with multivariable analyses of prognostic factors.

研究设计:预后因素多变量分析的随机对照试验.

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Study Design . Randomized controlled trial.

研究设计:随机对照试验.

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Study Design. A randomized controlled trial.

研究设计: 一项随机对照试验.

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Study Design. Cluster randomized controlled trial.

研究设计:一组随机控制试验.

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They used a controlled trial to see what happened when workers were paid unexpectedly generous rates.

他们使用对照试验来观察当工人得以支付格外慷慨的工资后会有什么发生.

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These findings should be quite reliable as the study was a randomised, double - blind controlled trial.

因为这个研究是随机的, 双重盲目控制的实验,所以这些发现应该是非常可靠的.

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This study is registered as an International Standard Randomised Controlled Trial , number ISRCTN 38354748.

此研究已登记为国际标准随机对照实验, 编号为ISRCTN38354748.

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This randomized, double - blind, placebo controlled trial tested long - term use of erythromycin ( EM ) to reduce COPD excacerbations.

本随机, 双盲, 安慰剂对照试验研究了 长期 用红霉素 ( EM ) 能否减少COPD的恶化.

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We investigated the effects of PFO closure for migraine in a randomized, double - blind controlled trial.

我们应用随机 、 双盲、安慰剂对照的临床试验研究卵圆孔未闭(PFO)封堵术对偏头痛治疗效果.

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