Table 6. Relationship between Ki67 status and Nottingham Prognostic Index (NPI).
| Ki67 high expression n (%) | Ki67 low expression n (%) | X2 | P | |
|---|---|---|---|---|
| NPI score | 9.402 | 0.009 | ||
| 2.00–3.40 | 196 (41.7) | 61 (58.1) | ||
| 3.41–5.40 | 241 (51.3) | 38 (36.2) | ||
| > 5.40 | 33 (7.0) | 6 (5.7) | ||
| Grade | 23.322 | 0.000 | ||
| High histological grade | 62 (13.8) | 5 (5.1) | ||
| Intermediate histological grade | 338 (75.3) | 66 (66.7) | ||
| Low histological grade | 49 (10.9) | 28 (28.3) | ||
| Tumor size | 5.723 | 0.126 | ||
| T1 | 223 (40.6) | 71 (50.1) | ||
| T2 | 286 (52.1) | 58 (40.8) | ||
| T3 | 19 (3.5) | 6 (4.2) | ||
| T4 | 21 (3.8) | 7 (4.9) | ||
| Lymph nodes | 1.848 | 0.397 | ||
| N0 | 266 (59.4) | 54 (61.4) | ||
| N1 | 181 (40.4) | 33 (37.5) | ||
| N2 | 1 (0.2) | 1 (1.1) |