Volume 136, Issue 4, Pages 1206-1214 (April 2009) Prospective Derivation and Validation of a Clinical Prediction Rule for Recurrent Clostridium difficile Infection  Mary Y. Hu, Kianoosh Katchar, Lorraine Kyne, Seema Maroo, Sanjeev Tummala, Valley Dreisbach, Hua Xu, Daniel A. Leffler, Ciarán P. Kelly  Gastroenterology  Volume 136, Issue 4, Pages 1206-1214 (April 2009) DOI: 10.1053/j.gastro.2008.12.038 Copyright © 2009 AGA Institute Terms and Conditions

Figure 1 (A) Receiver operating characteristic curves for the clinical prediction model of recurrent C difficile infection. The area under the curve for the derivation cohort was 0.83 (95% CI: 0.70–0.95), and the area-under-the-curve for the validation cohort was 0.80 (95% CI: 0.67–0.92). The dashed line represents a test of no discrimination. (B) Receiver operating characteristic curves for the combined prediction model of recurrent C difficile infection. The area under the curve for the derivation cohort was 0.89 (95% CI: 0.80–0.99), and the area under the curve for the validation cohort was 0.62 (95% CI: 0.44–0.80). The dashed line represents a test of no discrimination. Gastroenterology 2009 136, 1206-1214DOI: (10.1053/j.gastro.2008.12.038) Copyright © 2009 AGA Institute Terms and Conditions