Inter-reviewer Variability in Interpretation of pH-Impedance Studies: The Wingate Consensus

C. Prakash Gyawali, Benjamin Rogers, Marzio Frazzoni, Edoardo Savarino, Sabine Roman, Daniel Sifrim

Research output: Contribution to journalShort surveypeer-review

13 Scopus citations


Ambulatory pH-impedance monitoring evaluates gastroesophageal reflux disease (GERD) symptoms that persist despite empiric treatment trials.1 Although automated analysis of pH-impedance monitoring is known to overestimate non–acid reflux episodes,2 even experts may disagree on individual reflux episodes,3,4 and accurate identification of postreflux swallow-induced peristaltic wave (PSPW). We hypothesized that a formal consensus meeting between expert pH-impedance reviewers would establish definitive criteria for identification of reflux episodes and PSPW, and improve inter-reviewer variability.

Original languageEnglish
Pages (from-to)1976-1978.e1
JournalClinical Gastroenterology and Hepatology
Issue number9
StatePublished - Sep 2021


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