Published trials often differ from conference abstracts of the same trial

From: NeLM Headline News Abstracts of randomised controlled trials (RCT) presented at conferences often differ from the final full-length published version, according to a study appearing in JAMA this week. The authors aimed to investigate the degree of consistency between RCT abstracts presented at scientific meetings and the subsequent full-length publication. ... Toma, Mustafa. "Transition from meeting abstract to full-length journal article for randomized controlled trials." JAMA 295.11 (2006):1281-7.