This is a research summary of a study that found one out of every five cancer trials that “did not finish” which actually means that they stopped early for futility, if I am reading between the lines properly. Of those studies, 40% stopped early because of poor accrual.
Cancer.net. One in Five Clinical Trials for Adults with Cancer Never Finish – New Study Examines the Reasons. Genitourinary Cancers Symposium. January 28, 2014. Available at http://www.cancer.net/one-five-clinical-trials-adults-cancer-never-finish-%E2%80%93-new-study-examines-reasons.