Table 1.
Patient Baseline Characteristics
| All Patients N=525 |
Ki67 Low N=152 |
Ki67 Intermediate N=260 |
Ki67 High N=113 |
P-value | |
|---|---|---|---|---|---|
| Age at Diagnosisa (years) | |||||
| 59 [50, 68] | 60 [51.5, 69] | 59 [50, 68] | 56.5 [47.5, 65] | 0.0921 | |
| Race/Ethnicity b | |||||
| White | 296 (58%) | 100 (67%) | 135 (53%) | 61 (55%) | 0.0143* |
| Hispanic/Latino | 43 (8%) | 16 (11%) | 19 (8%) | 8 (7%) | |
| Black/African American | 64 (13%) | 9 (6%) | 43 (17%) | 12 (11%) | |
| Asian/Pacific Islander | 53 (10%) | 13 (9%) | 29 (11%) | 11 (10%) | |
| Other | 58 (11%) | 11 (7%) | 29 (11%) | 18 (16%) | |
| Unknown | 11 (2%) | 3 (2%) | 5 (2%) | 3 (3%) | |
| Menopausal Status b | |||||
| Pre-Menopausal | 153 (30%) | 35 (24%) | 79 (31%) | 39 (37%) | 0.0085* |
| Post-Menopausal | 345 (68%) | 110 (74%) | 173 (68%) | 62 (58%) | |
| Peri-Menopausal | 9 (2%) | 3 (2%) | 1 (1%) | 5 (5%) | |
| Unknown | 18 (3%) | 4 (3%) | 7 (3%) | 7 (6%) | |
| Largest Tumor Sizea (cm) | |||||
| 1.5 [0.9, 2.2] | 1.2 [0.8, 1.6] | 1.6 [1.2, 2.3] | 1.6 [1.2, 2.4] | <0.0001* | |
| Tumor Grade b | |||||
| Well Differentiated | 78 (15%) | 56 (37%) | 21 (8%) | 1 (1%) | <0.0001* |
| Intermediate | 298 (57%) | 89 (59%) | 177 (68%) | 32 (29%) | |
| Poorly Differentiated | 146 (28%) | 6 (4%) | 61 (24%) | 79 (70%) | |
| Unknown | 3 (<1%) | 1 (<1%) | 1 (<1%) | 1 (<1%) | |
| Nodal Status b | |||||
| Positive | 58 (11%) | 6 (4%) | 36 (14%) | 16 (14%) | 0.0040* |
| Negative | 466 (89%) | 146 (96%) | 224 (86%) | 96 (86%) | |
| Unknown | 1 (<1%) | 0 (0%) | 0 (0%) | 1 (<1%) | |
a
Median [1st Quartile (Q1), 3rd Quartile (Q3)];
b
N(%);
*
P <0.05