Table 2.
Comparison of median PI, AI, and iMVD between the 3 histological grade groups in canine SMGAa
| Histologic grade | ||||
|---|---|---|---|---|
| Parameter | I | II | III | P-value |
| Median PI | 18.8 | 43.2 | 49.2 | 0.0013b |
| Median AI | 4.0 | 7.5 | 1.8 | 0.22 |
| Median iMVD | 11.9 | 12.6 | 11.9 | 0.89 |
a
SMGA — simple mammary gland adenocarcinoma, PI — roliferation index, AI — apoptotic index, iMVD — intra-tumor microvessel density.
b
Significant P-value. Grades III and II had a significantly higher median PI than grade I. The difference in median PI between grades II and III was not statistically significant.