If the author (s) do not state explicitly that the trial was randomized, but randomization cannot be ruled out, the report is classified as a 'CCT' (controlled clinical trial).

如作者未说明该试验是否采用随机分配，而读者不能排除其随机分配的可能，则将之归为CCT(临床对照试验)。

youdao

Methods A randomized double-blind parallel controlled clinical trial was conducted.

方法本研究采用随机、双盲、平行对照的临床研究方法。

youdao

Methods. We conducted a randomized controlled multicenter clinical trial enrolling patients with cervical disc disease.

方法：作者进行了关于颈间盘疾病患者的随机对照、多中心的临床试验。

youdao

But a related Abbott drug, TriCor, failed to prove its benefits in a large randomized controlled clinical trial.

FORBES: Why Merck's Niacin Failure Will Scare Drug Researchers

More substantial and convincing support for such a recommendation to eat cherries as a way to reduce gout flares would ideally emerge from a randomized controlled clinical trial.

FORBES: Can Eating Cherries Prevent Gout Attacks?

For one, the groups noted the analysis is a retrospective study, not a prospective, randomized controlled clinical trial, which many regard as a gold standard for ferreting out safety concerns.

FORBES: The Confusion Over A Pair Of Diabetes Drugs And Pancreatitis