Table 1. Clinico-biological characteristics of patients and tumors.
| Characteristics | Training set (n=109) | Validation set (n=105) |
|---|---|---|
| Age (years) | ||
| Means (min-max) | 55.6 (36-75) | 54.2 (40-69) |
| >50 | 74 (68%, 95%CI : 59%-77%) | 68 (65%, 95%CI : 56%-74%) |
| <50 | 35 (32%, 95%CI : 23%-41%) | 37 (35%, 95%CI : 26%-44%) |
| Size | ||
| T1 | 77 (71%, 95%CI :62%-79%) | 77 (73%, 95%CI : 65%-82%) |
| T2 | 32 (29%, 95%CI : 20%-38%) | 28 (27%, 95%CI : 19%-35%) |
| Elston-Ellis grade | ||
| I | 63 (58%, 95% CI:49%-67%) | 48 (46%, 95% CI : 36%-55%) |
| II | 35 (32%, 95%CI:23%-41%) | 41 (39%, 95%CI : 30%-48%) |
| III | 9 (8%, 95%CI :3%-13%) | 16 (15, 95%CI : 8%-22%) |
| Missing values | 2 (2%) | 0 |
| Vascular invasion | ||
| Yes | 10 (9%, 95%CI:4%-14%) | 20 (19%, 95%CI :12%-26%)) |
| ER status (IHC) | ||
| Positive | 109 (100%) | 105 (100%) |
| PR status (IHC) | ||
| Positive | 83 (76%, 95%CI:68%-84%) | 80 (76%, 95%CI:68%-84%) |
| KI67 | ||
| < 14% | nd | 47 (45%, 95%CI:36%-55%) |
| > 14% | nd | 58 (55%, 95%CI:46%-64%) |
| Genomic grade | ||
| GGI 1 | nd | 56 (60%, 95%CI:50%-69%) |
| GGI 3 | nd | 38 (40%, 95%CI:30%-49%) |
| Undetermined | nd | 11 (10.5%) |
Min: minimum; max: maximum. GG: genomic grade; ER: estrogen receptors; PR: progesterone receptor; 95%CI: Confidence Interval.