Data items

The following baseline characteristics from the population used in each study were collected: age, number of males, percentage of patients who received an ileal conduit, pathological stage of T2 or higher, and percentage of patients who received neoadjuvant chemotherapy. Not all studies included ethnic/racial demographic information, and thus this was not included as part of the collected baseline characteristics. The primary outcome of interest was a 90-day complication rate sub-grouped by the Clavien-Dindo grading scale. Secondary outcomes of interest included operation time, estimated intraoperative blood loss, length of stay, lymph node yield, number of patients with positive lymph nodes, positive surgical margins, and quality of life. Quality of life was assessed using the European Organization for Research and Treatment of Cancer (EORTC) QLQ-C30 questionnaire, a health-related quality of life questionnaire designed specifically for cancer patients [20]. Study outcomes were compatible with the aforementioned domains.