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 The cases are divided into treatment group and control group according to completely randomized design of non-equilibrium, treatment group with 30 cases, control group with 28 cases.
方法按完全随机非平衡设计分为治疗组和对照组，治疗组30例，对照组28例。
Methods The cases are divided into treatment group and control group according to completely randomized design of non-equilibrium, treatment group with 30 cases, control group with 28 cases.
方法按完全随机非平衡设计分为治疗组和对照组，治疗组30例，对照组28例。
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