Fig. 8.

Forest plot conducted using RevMan, showing the MD be-tween baseline and up to 6 weeks post intervention HAM-D scores. Each study in this analysis significantly favors psilocybin for reducing depressive symptoms at up to 6 weeks post intervention with the drug. The squares represent the individual studies with the size repre-sentative of the weight of the study in the analysis. The diamond represents the overall/summary effect, and the lines represent the confidence intervals.

MD, mean difference; CI, confidence interval; HAM-D, Hamilton Depression Rating Scale.