What Is the Role of the Inflammatory Bowel Disease Panel in Diagnosis and Treatment?  Millie D. Long, Bruce E. Sands  Clinical Gastroenterology and Hepatology  Volume 16, Issue 5, Pages 618-620 (May 2018) DOI: 10.1016/j.cgh.2018.02.010 Copyright © 2018 AGA Institute Terms and Conditions

Figure 1 An example diagnostic test: positive predictive value (PPV) and negative predictive value (NPV) as a function of prevalence of disease. For any given test, the lower the prevalence, the lower the PPV. As inflammatory bowel disease is a low prevalence condition in the general population, * even a test with good sensitivity and specificity (>90%) may have a low PPV. ∗In populations with higher prevalence of disease (i.e., symptomatic populations with specific clinical characteristics and/or laboratory abnormalities) the PPV would differ. Clinical Gastroenterology and Hepatology 2018 16, 618-620DOI: (10.1016/j.cgh.2018.02.010) Copyright © 2018 AGA Institute Terms and Conditions