How can I interpret and write down the results of the following forest plot? For example, top left graph shows comparison of AvsB and includes 3 studies A B C, what's the meaning of red and blue shapes?
As is presented in the figure you have used STATA for analysis. This Fig shows a net splitting graph which can be different in software. By the way, all software does the same thing (comparison OR mixing direct and indirect estimates). In my point of view, you have to first get more data about the basics of direct and indirect comparisons. Blue: direct comparison | Red: a mixed comparison. Kindly, check the attached paper.