próba losowa

But then a randomized trial showed it was a bad idea.

It is the patient's choice to be in a randomized trial.

Even if a particular study is a randomized trial, it may not provide strong evidence for the effectiveness of disease management.

"Has there been a randomized trial of screening for this?"

However, the two groups were not necessarily comparable, as it was no longer a randomized trial.

Now consider the design of a randomized trial with an all death endpoint.

Any of the treatment groups in a randomized trial.

First consider the design of a randomized trial with a cancer death endpoint.

There is no single institution that will enroll enough patients to perform a randomized trial.

Only a properly designed randomized trial can demonstrate whether an important benefit exists.

A randomised trial, he says "is never going to happen".

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

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

Then again, variation among nations is to some extent a bit of a randomised trial.

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

A randomised controlled trial demonstrated a significant drop in pain after 10 days training.

But we will never know because we can't do a randomised controlled trial.

The authors found an "acute need" for more randomised controlled trials.

The optimal regimen is not clearly established and should be studied in a randomised trial.

It is widely accepted to have been the first randomised curative trial.