Methods parallel group, stratified randomization, double blinded, muti-center clinical trail was designed.
方法采取平行组设计、分层随机、双盲、多中心临床试验方法。
Objective To compare the balance of simple randomization, stratified blocked randomization and minimization.
目的比较简单随机化、中心分层区组随机化和最小化法的均衡性。
Objective To compare the balance of simple randomization, stratified blocked randomization and minimization.
目的比较简单随机化、中心分层区组随机化和最小化法的均衡性。
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