The NLST is the first trial with sufficient numbers of participants using a randomized design to enable the comparison of mortality differences between spiral CT and chest X-ray, Aberle said.
NLST则是第一次包含大量随机指定的受试者的实验，使得在螺旋CT成像和X射线胸透之间做死亡率的比较成为了可能。
Methods: Randomized, double-blind and drug parallel comparison trial were adopted.
方法：采用随机、双盲、平行对照试验。
Methods and Results— We conducted a randomized multicenter comparison of these 2 treatment strategies in patients with paroxysmal AF resistant to at least 1 antiarrhythmic drug.
方法和结果—对于这两种治疗方法，我们在至少对一种抗心律失常药物耐药的陈发性房颤患者中进行了一个随机的多中心的对比研究。
Methods. Single-centre, randomized, prospective, double-blinded comparison of bosentan and placebo.
方法：单中心，随机，前瞻性，双盲比较波生坦和安慰剂。
The measurement data in multiple groups were compared with randomized analysis of variance and the comparison among groups were performed with SNK test.
多组间的计量资料比较采用随机分组的方差分析，组间比较采用SNK检验。
DESIGN: Complete randomized groups and controlled comparison.
设计：完全随机分组设计，对比观察。
For paired comparison, the humeri were divided into 2 randomized groups.
每对肱骨分别分入2个随机组中，进行成对比较。
In variety comparison test designed with randomized block, each trait of the varieties was analysed, and all traits that was not of significance were rejected.
在随机区组设计的作物品比试验中，对参试品种诸性状逐一进行方差分析，剔除所有不显著性状。
DESIGN: a randomized grouping comparison and placebo controlled study.
设计：随机对比观察，安慰剂对照。
The comparison of 22 varieties of Sichuan lacquer tree under identification and 7 control varieties is made with the design of completely randomized blocks.
本研究采用完全随机区组设计，对四川漆树22个审定品种和7个对照品种作对比试验。
Methods Multi-center randomized double-blind trial with positive control and split-mouth comparison was designed.
方法多中心随机、双盲、阳性药物对照、左右半口对照设计。
The subject choice, randomized method, blind method, intra-group comparison, sample, compliance, statistical method, therapeutic effect assessment index, survey and side effects were observed.
调查内容包括研究对象选择、随机化方法、盲法、组间可比性、样本大小、依从性、统计学处理、疗效评价指标、随访和不良事件观察等。
The subject choice, randomized method, blind method, intra-group comparison, sample, compliance, statistical method, therapeutic effect assessment index, survey and side effects were observed.
调查内容包括研究对象选择、随机化方法、盲法、组间可比性、样本大小、依从性、统计学处理、疗效评价指标、随访和不良事件观察等。
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