controlled trial

If nothing else, a controlled trial needs a hypothesis to test.

Updated results of the population based controlled trial in Germany.

"We would demand to see the data from a controlled trial.

There have been no controlled trials so the optimal treatment is not known.

No one quite knows how it works, but controlled trials are consistently successful.

The review noted that a large controlled trial "may no longer be ethical."

These results should be reproduced and extended in a larger, controlled trial.

No controlled trials yet exist, but the experience of this group is clearly relevant.

Unfortunately, this study suffered from not being a properly controlled trial.

This was not a controlled trial but a retrospective assessment of the patients seen over the previous seven years.

This treatment has not been tested in a randomised controlled trial.

Extensive clinical case evidence and a small controlled trial support its efficacy.

Why don't you take up my earlier suggestion of doing a randomised controlled trial?

Evidence from at least one properly designed randomized, controlled trial.

A number of randomised controlled trials have now been carried out.

"We ought to do this on the basis of reliable data from controlled trials," he said.

But the company must then do a larger, controlled trial to show that the drug actually prolongs lives.

The condition is too rare for controlled trials to have been undertaken.

Because of its rarity to date there have been no controlled trials.

This latter presumption, however, is not supported by controlled trial data.

A controlled trial of a human papillomavirus type 16 vaccine.

However these were not controlled trials and no standard objective assessment tool was used.

However, results from recent randomized controlled trials have been disappointing.

For example, two earlier controlled trials, each involving only about 100 men with early stage cancer, showed no differences in outcomes.

This comparison should take place within the context of a randomized controlled trial.