Skip to main content
. 2015 Apr 28;21(16):5009–5016. doi: 10.3748/wjg.v21.i16.5009

Figure 1.

Figure 1

Based on the results obtained from intraesophageal manometry and 24-h-long intraesophageal pH/impedance monitoring, the subjects were classified into three groups according to the Rome III criteria: acid reflux-related mechanism (n = 22), non-acid reflux-related mechanism (n = 34), and functional heartburn (n = 22). pH-POS: Excessive intraesophageal acid exposure time; HE: Hypersensitive esophagus (non-excessive esophageal acid exposure time and positive symptom index); FH: Functional heartburn; PPI: Proton pump inhibitor.