Table 2 - Percent overlap in esophageal acid exposure time pH <4 between Barrett's esophagus and NERD, and erosive esophagitis (EE) and NERD, respectively.


From the following article

Nonerosive reflux disease

Ronnie Fass and Ram Dickman

GI Motility online (2006)

doi:10.1038/gimo42

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Groups comparedTotalUprightSupine

pH positive.

Barrett's esophagus, NERD31.6%37.5%20.8%
Erosive esophagitis, NERD47.4%64.7%81.8%