Table 4. Relationship between PR status and Nottingham Prognostic Index (NPI).
| PR high expression n (%) | PR low expression n (%) | PR negative n (%) | X2 | P | |
|---|---|---|---|---|---|
| NPI score | 22.319 | 0.000 | |||
| 2.00–3.40 | 157 (51.0) | 33 (45.8) | 78 (36.3) | ||
| 3.41–5.40 | 138 (44.8) | 28 (38.9) | 122 (56.7) | ||
| > 5.40 | 13 (4.2) | 11 (15.3) | 15 (7.0) | ||
| Grade | 25.441 | 0.000 | |||
| High histological grade | 18 (6.1) | 11 (15.9) | 41 (20.6) | ||
| Intermediate histological grade | 232 (78.1) | 47 (68.2) | 137 (68.8) | ||
| Low histological grade | 47 (15.8) | 11 (15.9) | 21 (10.6) | ||
| Tumor size | 9.326 | 0.316 | |||
| T1 | 172 (46.1) | 31 (35.2) | 101 (39.3) | ||
| T2 | 171 (45.8) | 51 (58.0) | 136 (52.9) | ||
| T3 | 13 (3.5) | 1 (1.1) | 11 (4.3) | ||
| T4 | 17 (4.6) | 5 (5.7) | 9 (3.5) | ||
| Lymph nodes | 3.718 | 0.446 | |||
| N0 | 169 (59.7) | 44 (59.5) | 126 (62.7) | ||
| N1 | 114 (40.3) | 29 (39.2) | 74 (36.8) | ||
| N2 | 0 (0) | 1 (1.3) | 1 (0.5) |