Prospective Evaluation of PH-impedance Tracings According to the Wingate Consensus, and Influence on GERD Classification According to the Lyon Consensus

Prior upper GI endoscopy indicative of structural disease (except for oesophagitis or hiatal hernia).

Incomplete pH-MII (less than 21 hours recording);

Ph-MII performed on PPI

Suboptimal quality of the tracings preventing interpretation in clinical practice;