Ever since the IWGCO was formed, it has been researching the endoscopic diagnosis of non-erosive reflux disease. Currently, this is the role of the IWGCO Minimal Change Working Subgroup.

Lack of inter-observer agreement on minimal changes led to their non-inclusion in the Los Angeles Classification of reflux esophagitis.

In the belief that minimal changes are of potential merit for diagnosis, the IWGCO has maintained its effort and interest in this area.

The group has researched the possibility that high resolution magnification endoscopy could improve the diagnostic value of both traditional and novel minimal change criteria.

Other possibilities for better recognition of non-erosive reflux esophagitis have been considered by the group