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Clinical trials can be improved by managing the learning curve
Date:7/29/2010

DURHAM, N.C. Practitioners of clinical medicine are familiar with learning curves, and strategies like simulation are increasingly used to minimize learning-curve effects on clinical care. Because similar learning curves have been hinted at in some clinical trials, researchers at Duke University Medical Center studied the phenomenon in the data record of a large, multi-site clinical trial. Their findings point to ways to improve the quality of future trials through better training and simulation exercises.

The team found that research conducted by investigators in the large VALsartan In Acute myocardial iNfarcTion (VALIANT) trial progressed in a way consistent with a learning curve. This trial compared long-term treatment of 12,367 patients at 931 sites with the drugs valsartan, captopril or both in high-risk patients after a heart attack (myocardial infarction).

Duke researchers found that departures from the trial protocol were more common for earlier-enrolled patients at the study sites. Departures were defined both as violations, or failure to comply with the final study protocol, and as deviations, instances of non-compliance resulting from unforeseen circumstances.

Queries questions about data generated in the study were also significantly more common for patients enrolled earlier in the trial.

Protocol departures were more common at sites with less frequent enrollment for example, two or fewer enrollees per month compared to six or more subjects per month.

"We embarked on this evaluation to begin to unravel how to further improve clinical trials," said Jeffrey Taekman, M.D., co-lead author and assistant professor in the Department of Anesthesiology at Duke, and director of the Duke University Human Simulation and Patient Safety Center. "We will take these findings and incorporate them into simulation programs for study sponsors. Through a careful 'walk-through' of a study protocol we can catch and addr
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Contact: Mary Jane Gore
mary.gore@duke.edu
919-660-1309
Duke University Medical Center
Source:Eurekalert

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