Table 1.
Patient and tumor characteristics.
| Combined detection method (N = 50) | Radioisotope detection method alone (N = 49) | Total N = 99 | P value | ||
|---|---|---|---|---|---|
| Age (years), mean (SD) | 62.2 (12.0) | 60.2 (12.5) | 61.3 (12.2) | 0.42 | |
| BMI (kg/m²), mean (SD) | 26.8 (4.6) | 25.2 (3.9) | 26.0 (4.3) | 0.08 | |
| Post-menopause, no. (%) | 34 (68) | 30 (62.5) | 64 (65.3) | 0.67 | |
| Tumor diameter (mm), mean (SD) | 16.9 (10.8) | 20.0 (15.5) | 18.4 (13.3) | 0.43 | |
| SBR grade | I | 13 (31) | 17 (37.8) | 30 (34.5) | 0.20 |
| II | 25 (59.5) | 19 (42.2) | 44 (50.6) | ||
| III | 4 (9.5) | 9 (20) | 13 (14.9) | ||
| Histological type | IDC | 31 (63.3) | 33 (67.3) | 64 (65.3) | 0.58 |
| ILC | 7 (14.3) | 4 (8.2%) | 11 (11.2) | ||
| DCIS | 6 (12.2) | 4 (8.2) | 10 (10.2) | ||
| Other | 5 (10.2) | 8 (16.3) | 13 (13.3) | ||
| Hormone receptor-positive, no. (%) | 39 (86.7) | 39 (84.8) | 78 (85.7) | 1.00 | |
| HER2 receptor-positive, no. (%) | 2 (4.7) | 7 (15.2) | 9 (10.1) | 0.16 | |
| Positive sentinel lymph node, no. (%) (micro- or macrometastasis) | 18 (30) | 17 (34.7) | 35 (35.4) | 1.00 | |
| Complete axillary lymph node dissection for macrometastasis, no. (%) | 14 (28) | 11 (22.4) | 25 (25.3) | 0.64 | |
DCIS ductal carcinoma in situ, HER2 human epidermal growth factor receptor 2, IDC infiltrating ductal carcinoma, ILC infiltrating lobular carcinoma, SBR Scarff-Bloom-Richardson.