Fig. 1
From: Propofol versus the world: The whole is not always greater than the sum of its parts
Comparison of effect estimates depending on data extraction decisions. The top extraction would be consistent with the protocol specifications. The bottom extraction of one year mortality estimates uses incorrect denominator data. Risk ratios are presented using a Mantel–Haenszel random-effects model, as opposed to a fixed-effect model. Note that this plot was not created with the intention of pooling, but rather to compare: therefore, the summary estimates have been removed