- For patients who will be receiving bevacizumab, urine protein must be screened by urine analysis for urine protein creatinine (UPC) ratio; for UPC ratio > 0.5, 24-hour urine protein must be obtained and the level must be < 1,000 mg for patient enrollment; the urine protein used to calculate the UPC ratio must be obtained within 14 days prior to registration; UPC or 24-hour protein is not required for patients who will not receive bevacizumab Note: UPC ratio of spot urine is an estimation of the 24-hour urine protein excretion - a UPC ratio of 1 is roughly equivalent to a 24-hour urine protein of 1 gm