I would like to work on a meta-analysis project. I have kept 8 studies that satisfy my criteria and I'd like to continue with these. Their results are formed as odds ratios (OR) and confidence intervals (CI).
I read that I should convert them into log values and estimate the standard errors. I did this, but I don't know how to continue since all examples that I have seen are about trials and provide the accurate numbers of outcomes (i.e., before treatment, after treatment, or death/alive, etc.) while I have only ORs and CIs.
Could anyone help me, please? Also, please propose a free software capable of analyzing ORs and CIs.