]> 2026-07-31T07:53:15+00:00 WBR0379 0 en 1 - False Negative Rate 1 - False Positive Rate Biostatistics/Epidemiology A novel diagnostic serum assay is developed to detect enzyme XY in sera of patients with ulcerative colitis. Researchers enroll young adults with complaints of chronic diarrhea and abdominal pain and withdraw blood for the detection of serum enzyme XY among these patients. The second day, all patients undergo endoscopic examination, and biopsies are taken to confirm or rule out the diagnosis of ulcerative colitis. Results from patients' serum enzyme XY are then compared with results from the biopsy. Which equation is used to calculate the proportion of patients that are known to have ulcerative colitis on biopsy and also have detectable serum enzyme XY? A Gastrointestinal 2020-10-28T00:23:15Z 2459150.5161458 WBR0379