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. Author manuscript; available in PMC: 2017 Oct 1.
Published in final edited form as: Dis Esophagus. 2015 Jul 14;29(7):820–828. doi: 10.1111/dote.12389

Fig. 2.

Fig. 2

Receiver operating characteristic (ROC) curves defining optimal esophagogastric junction contractile integral (EGJ-CI) thresholds for segregating subjects with normal and abnormal esophageal acid exposure. Both EGJ-CI calculated for a single respiratory cycle (EGJ-CI/SRC) and corrected for respiration (EGJ-CI/CRC) provided equivalent segregation of subjects with and without abnormal acid exposure times. Threshold values provided sensitivity of 61–65% range and specificity of 58–65%, with modest area under the curve (0.6–0.7).