I am comparing 2 procedures Endovascular vs Surgical , outcome variable is the percentage of favorable outcome from different publications : study1: Endovascular , 200 patients , favorable outcome 85% study2 : Endovascular , 400 patients , favorable outcome 87% study3: surgical , 250 patients, favorable outcome 92% study4: surgical, 300 patients, favorable outcome 82% study5: surgical, 130 patients, favorable outcome 81% Based on this, the average favorable outcome was 86.5% for the Endovascular group 600 patients (considering the weight of each study), and was 85.5% for the Surgical group 680 patients. How can I know this difference is significant ? What statistical test would be the best here ?
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