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. Author manuscript; available in PMC: 2014 Jan 1.
Published in final edited form as: J Pediatr Gastroenterol Nutr. 2011 Apr;52(4):10.1097/MPG.0b013e3181ef378b. doi: 10.1097/MPG.0b013e3181ef378b

Figure 1.

Figure 1

Association of proximal pH events with changes in distal esophageal pH, according to each of the definitions for abnormal proximal pH used. As can be seen, the proportion of proximal events without any correlation at the distal pH sensor increased with more liberal definitions of supraesophageal gastric reflux (* and ** indicate P values for pairwise comparisons of the proportions of events with and without distal correlation, as detected by each alternative definition of supraesophageal gastric reflux versus conventional criteria [pH <4.0]).