2.3. Data Collection
cancer, Comorbidity
CANCER, PATHOLOGY, COMPLICATIONS
Demographic data collected on each patient included age, gender, race, Charlson Comorbidity Index (CCI), and the reason for urinary diversion. Surgical data were also collected: preoperative and postoperative pathology and cancer staging if applicable, preoperative laboratory values, surgical date, and randomization to either the ink or control groups. Postoperative data included the length of the hospital stay, in hospital complications, date of ureteroenteric stent removal, renal function as determined by Glomerular Filtration Rate (GFR), any related postoperative imaging, loopogram date and results, and looposcopy date and results. All patients were followed for one year after their surgery for any complications and additional surgeries or procedures.