RT Journal Article SR Electronic T1 Understanding statistical terms: 1 JF Drug and Therapeutics Bulletin JO Drug Ther Bull FD BMJ Publishing Group Ltd SP 22 OP 24 DO 10.1136/dtb.2009.01.0003 VO 47 IS 2 YR 2009 UL http://dtb.bmj.com/content/47/2/22.abstract AB An increasing number of statistical terms appear in journal articles and other medical information. A working knowledge of these is essential in assessing clinical evidence. With this in mind, we are producing a series of explanatory articles covering various statistical terms and their uses. This, the first article in the series, will focus on some of the most common terms used in randomised controlled trials.1