"selective trials" is a correct and usable phrase in written English, and can be used to describe a process in which only certain individuals or items are chosen for testing
For example, "The scientists conducted selective trials of the new vaccine to determine its effectiveness."
Only a few selective trials had been performed in Continental Europe.
Booster sessions were reported for a few of the selective trials, with variable results.
Nine different prevention programs were tested in 17 selective trials that met our inclusion criteria, and their results are summarized in Table 3.
Evaluations of programs for children at risk, in indicated or selective trials, are less demanding in terms of resources and are likely to produce higher effect sizes.
Selective trials targeting families affected by internal stress (Parent Management Training/PMT, New Beginnings, Family Bereavement Program, Adolescents and Their Parents with Aids, considered together) reduced externalizing behavior in the children at least 11 months post intervention.
Such systems can arise by selective trial and error mechanisms.
8 11 This selective trial dissemination can distort the medical evidence and challenge physicians, prescription guideline writers, payers and formulary decision-makers' abilities to recommend and provide the right drugs for the right patients.
The review did not allow for conclusions regarding the effects of any other program subject to a selective trial, since the remaining studies were too heterogeneous to be pooled in a meta-analysis.
Due to the fact that the majority of studies of antidepressants use a highly selective trial population, without significant co-morbidity and with minimum numbers of elderly subjects, there are fundamental problems extrapolating the results to the elderly population as a whole (Parikh 2000).
In their retrospective analysis, Folprecht et al (2005) found that in studies which enrolled patients with metastases confined to the liver, 24 54% of patients were able to undergo resection of their metastases subsequent to chemotherapy, whereas only 1 26% of patients in non-selective trials (patients with hepatic or extrahepatic disease) became eligible for secondary surgery.
We would encourage programme's such as the Scottish Conservation Credits scheme and selective gear trials, and would also like to see those individuals who are actively increasing the sustainability of their gear being encouraged and positively rewarded.
