Figure 1.

Meta-analysis of the first dataset. Standardized mean differences (placebo versus baseline) for physical and biochemical parameters in the 29 trials of the first dataset, retrieved from a MEDLINE search. Black squares indicate single effect sizes, white squares are the subgroups' mean effect sizes, and whiskers the 95% CI. Reference numbers are given in square brackets. Positive values favor placebo treatment.

Meissner et al. BMC Medicine 2007 5:3   doi:10.1186/1741-7015-5-3
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