Fig. 3
Direction of changes in the abstract conclusion of 139 studies assessing preventive, treatment, or post-acute care interventions for COVID-19, from the first preprint version to the associated journal article or latest preprint version of each study. This Sankey diagram presents the changes made to the abstract conclusion for the same study, between the first preprint version on the left, and the latest available source version on the right (journal article or latest preprint version for studies that have not been published in a journal). The colored flow lines represent the direction of the change: green lines represent change from negative to neutral or positive, or from neutral to positive, and red lines represent change from positive or neutral to negative, and from positive to neutral