A comparative evaluation of the measurement properties of three histological indices of mucosal healing in ulcerative colitis: Geboes Score, Robarts Histopathology Index, and Nancy Index.

The GS, RHI, and NI are each capable of producing reliable and valid scores that are sensitive to changes in disease activity over time, in patients with moderately to severely active ulcerative colitis. While all three indices demonstrated relatively acceptable measurement properties, the GS and RHI performed better than the NI.