In all cases, the microstimulation effect was significantly smaller for large reward trials compared to small reward trials, fully supporting the results from the pooled data and decision model fitting.
Statistical results are unaffected when data were pooled across all microstimulation sites.> -wrap-foot> An independent site-by-site analysis confirmed that the effect of microstimulation was significantly decreased in large reward trials compared to small reward trials.
This often leads to the conduct of large clinical trials to identify small average treatment benefits for heterogeneous groups of patients.
Specific clinical entities are reviewed in order of the strength of evidence, proceeding through meta-analyses of multiple well-controlled trials to single small studies and case reports.
Parks and museums closed, new cancer patients were locked out of clinical trials, loans to small businesses and rural areas froze, time ran down on implementation of the Dodd-Frank financial-regulation law, trade talks had to be postponed.
Nephrology trials were more likely than cardiology trials to be smaller (64 versus 48% enrolling ≤100 patients), Phases I II, unblinded and to include a drug intervention.
If acupuncture has at least some placebo effect, attributable to the psychological effects of being administered a novel therapy, one would expect placebo-controlled trials to show smaller differences between groups than trials without placebo control.
In a meta-epidemiological study in osteoarthritis [ 4], the authors employed the difference in effect sizes between large and small trials to explore the small-study effects.
The number of patients in the three arms of this trial was to small to make a meaningful comparison as to which treatment mode yields the best cosmetic scar outcome.
A high R is not a necessary criterion for surrogacy, however, as some of the unexplained variation may reflect the sampling error in each trial due to small sample size.
