Skip to main content
. Author manuscript; available in PMC: 2013 Aug 10.
Published in final edited form as: Clin Gastroenterol Hepatol. 2008 Apr 14;6(6):635–643.e1. doi: 10.1016/j.cgh.2008.01.009

Figure 5.

Figure 5

ROC curve for the detection of delayed gastric emptying with [13C]-Spirulina platensis GEBT measurements relative to the scintigraphic measurement of gastric emptying. Note that the performance characteristics are uniformly excellent even with a single breath sample at 150 minutes, but the sensitivity reaches 89% at 80% specificity when the 180 minute sample is also included. The AUC for the combined 150 and 180 minute samples was 0.893. Note also that the 45 minute sample adds little to the accuracy of determination of the GEBT for categorizing delayed GE above the accuracy of the combined 150 and 180 minute breath samples. Combining the three time points (45, 150 and 180 minutes) resulted in an AUC of 0.890.