Fig. 3

The completeness of 60 systematic reviews that had new trials added to a primary outcome meta-analysis in an update. The median completeness is represented for each systematic review from its publication date to the search date of its update (length of follow-up is marked), interquartile range (dark grey), and range (light grey). Individual completeness values at the search date of an update are illustrated for those with changes in conclusion (black dots) and no change in conclusion (grey dots)