TY - JOUR T1 - Glossary JF - Evidence Based Medicine JO - Evid Based Med SP - 160 LP - 160 DO - 10.1136/ebm.6.5.160-a VL - 6 IS - 5 A2 - , Y1 - 2001/09/01 UR - http://ebm.bmj.com/content/6/5/160.2.abstract N2 - Allocation concealed: deemed to have taken adequate measures to conceal allocation to study group assignments from those responsible for assessing patients for entry in the trial (e.g., central randomisation; sequentially numbered, opaque, sealed envelopes; sealed envelopes from a closed bag; numbered or coded bottles or containers; drugs prepared by the pharmacy; or other descriptions that contain elements convincing of concealment. Allocation not concealed: deemed to have not taken adequate measures to conceal allocation to study group assignments from those responsible for assessing patients for entry in the trial (e.g., no concealment procedure was undertaken, sealed envelopes that were not opaque, or other descriptions that contain elements not convincing of concealment). Unclear allocation concealment: the authors of the article did not report or provide us with a description of an allocation concealment approach that allowed for classification as concealed or not concealed. Blinded: any or all of … ER -