Fig. 4.

Forest plot conducted using RevMan showing the MD between baseline and 5/6 weeks post intervention scores on QIDS. This illustrates how each study significantly favors psilocybin for reducing depressive symptoms. The squares represent the individual studies with the size representative 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; QIDS, Quick Inventory of Depressive Symptomatology.