Table 1.
Patient and tumor characteristics by method of detection.
| Characteristics | Screen-detected (n = 216) | symptomatic (n = 185) | p value |
| n (%) | |||
| Age (mean) | 61 | 53 | <.00001 |
| ≤50 | 29 (13.4) | 91 (49.1) | <.00001 |
| >50 | 187 (86.5) | 94 (50.8) | |
| Tumor size | |||
| ≤2 cm | 178 (82.4) | 99 (53.5) | <.00001 |
| >2 cm | 38 (17.5) | 86 (46.4) | |
| Histologic grade | |||
| G1: Well differentiated | 7 (3.2) | 9 (4.8) | .14 |
| G2: Moderately differentiated | 163 (75.4) | 122 (65.9) | |
| G3:Poorly differentiated/Undiff | 43 (19.9) | 49 (26.4) | |
| Missing data | 3 (1.4) | 5 (2.7) | |
| Lymph Node Status | |||
| N0 | 161 (74.6) | 136 (73.5) | .78 |
| N1mic | 11 (5.1) | 14 (7.6) | |
| N1 | 30 (13.9) | 24 (13) | |
| N2–N3 | 14 (6.5) | 11 (6) | |
| Ki67 | |||
| Ki67 ≤ 14% | 79 (36.6) | 42 (22.7) | <.004 |
| Ki67 > 14% | 33 (15.3) | 45 (24.3) | |
| Missing data | 104 (48.1) | 98 (53) | |
| Progesterone Receptor (PR) | |||
| Positive | 151 (70) | 144 (77.9) | .1 |
| Negative | 62 (28.7) | 39 (21.1) | |
| Missing data | 3 (1.4) | 2 (1.1) | |
| Tissue for Genomic testing | |||
| Surgical specimen | 203 (94) | 156 (84.3) | <.001 |
| Biopsy | 13 (6) | 29 (15.7) | |