Quercetin pretreated umbilical cord mesenchymal stem cells alleviate inflammatory bowel disease via IL-10 /Janus kinase 2/STAT3 signaling

Table 2 Histological Activity Index score

Score	Organizational changes
0	No inflammatory changes
1	Mild inflammation with scattered infiltrating mononuclear cells (1-2 Lesions)
2	Moderate inflammation with multiple lesions visible
3	Significant inflammatory changes, increased vascular density, and thickening of intestinal wall
4	Severe inflammatory changes, lymphocyte transmural infiltration, and decreased goblet cells