See Cochrane Library Users’ Group (CLUG)

A contingency table with two rows and two columns. It arises in clinical trials that compare dichotomous outcomes, such as death, for an intervention and control group or two intervention groups. a

See Risk difference

A brief summary of the study and its results. It should tell you what the study tried to show, how the researchers went about it, and what they found.

An analysis that controls (adjusts) for baseline imbalances in important patient characteristics.See also: Confounder

The name of the e-mail discussion list for Managing Editors.See also: Managing Editor (previously known as Review Group Co-ordinator (RGC))

An adverse outcome that occurs during or after the use of a drug or other intervention but is not necessarily caused by it.See also: Adverse effect

Data summarised by groups, for example summary outcome data for treatment and control groups in a controlled trial.See also: Control group, Controlled trial, Treatment

See Type I error

See External validity