The phrase "a sample of trials" is correct and usable in written English.
It can be used when referring to a subset or selection of trials in a study or experiment.
Example: "In our research, we collected a sample of trials to analyze the effectiveness of the new treatment."
Alternatives: "a selection of trials" or "a subset of trials".
The analysis was then extended to a sample of trials to determine which elements of the trials produce the most emissions.
We have examined the issue of bias in cluster trials by comparing a sample of trials against similar individually randomised studies from a review of hip protectors.
Multiple approaches exist to account for site in the analysis, and results may differ among them. 1 Another empirical study found that only 25% among a sample of trials published in 2000 and 2006 reported adjusted analyses and only 5%and10%0% of trials in these two years reported both adjusted and unadjusted analyses.
This project aims to survey the content, quality and accessibility of a sample of trials relevant to mental health conducted within low and middle-income countries; to compare these with studies conducted in high-income countries; and to assess their relevance for the needs of low and middle-income countries.
Problems also arise when trial protocols do not designate any primary outcomes, as seen in half (28/59) of protocols for a sample of trials published from 2002-2008, 12 and in 25% of randomised trial protocols that received ethics approval in Denmark in 1994-95.
Our study is based on a sample of trial protocols, each including several eligibility criteria.
Phase two involved semi-structured interviews with a sample of trial non-participants.
The second rater was trained by the first and both worked on a sample of trial news stories before proceeding to code the remaining stories.
To identify a sample of trial reports for the review we searched MEDLINE for publications with combinations of the search terms 'randomised', 'cluster', 'trial'studyudy'interventionion' and 'implement*' in their titles or abstracts (see online supplementary file S1).
12 From the list for each year (492 randomised controlled trials in total) we sampled every fifth study to obtain a sample of 100 trials (33 or 34 trials from each year).
Among all trials with at least one domain at high risk, we randomly selected a sample of 200 trials and retrieved the full text for each of these trials.
