The chance of an event happening or a condition occurring in a random trial.

概率某一事件在随机试验中的发生或条件发生的机率。

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Bias may arise because large random fluctuations of the estimated treatment effect can occur, particularly early in the progress of a trial.

治疗效应可能会出现较大的随机波动从而导致偏倚的产生，特别是在试验的早期。

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Study Design. A simple blind, random controlled clinical trial.

研究目的：单盲，随机对照临床试验。

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When trying to find out if something will work - be it a new policy, a new drug, a new teaching method - the gold standard of evidence is what comes out of a properly conducted random controlled trial.

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Like other bacteria, S. aureus mutates at random, and through trial-and-error it will eventually find a way to outsmart any drug.

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Patients tend to sign up for clinical trials when arthritis is at its most painful, he adds, and improvement in a trial may simply be random improvement over time, he says.

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