Figure 2.

Meta-analysis of the second dataset. Standardized mean differences (placebo versus no treatment) for physical and biochemical parameters in the 26 trials of the second dataset, selected from a published review on placebo effects [6]. For details, see Figure 1.

Meissner et al. BMC Medicine 2007 5:3   doi:10.1186/1741-7015-5-3
Download authors' original image