Table 1.
Clinicopathological variables in patients with unifocal, unilateral breast lesions
| Magnetic seed (n = 946) | Wire (n = 1170) | P ‡ | |
|---|---|---|---|
| Age (years)* | 59.9(10.4) | 60.4(10.6) | 0.210 |
| BMI (kg/m2 )† | 27.9 (24.4–32.1) | 28 (24–32) | 0.555 |
| Unknown | 93 | 235 | |
| Lesion size (mm)† | n = 764 | n = 931 | |
| Mammogram | 13 (9–20) | 13 (9–20) | 0.598 |
| Unknown | 105 | 75 | |
| Ultrasound | 12 (9–18) | 12 (8–17) | 0.219 |
| Unknown | 182 | 239 | |
| Tumour stage | n = 891 | n = 1147 | |
| Tis | 167 (18.7) | 256 (22.3) | 0.189 |
| T1 | 541 (60.7) | 637 (55.5) | |
| T2 | 126 (14.1) | 172 (15) | |
| T3 | 12 (1.3) | 16 (1.4) | |
| yT0 | 45 (5.1) | 66 (5.8) | |
| Unknown | 55 | 23 | |
| Nodal stage | n = 881 | n = 1147 | |
| N0 | 747 (84.8) | 973 (85.4) | 0.543 |
| N1 | 92 (10.4) | 105 (9.2) | |
| N2 | 7 (0.8) | 11 (1) | |
| N3 | 2 (0.2) | 8 (0.7) | |
| yN0 | 33 (3.7) | 42 (3.7) | |
| Unknown | 65 | 31 | |
| Histological diagnosis | n = 945 | n = 1169 | |
| Invasive ductal and lobular | 592 (62.6) | 715 (61.2) | 0.051 |
| DCIS | 172 (18.2) | 264 (22.6) | |
| Mixed invasive/DCIS | 120 (12.7) | 127 (10.9) | |
| Other | 61 (6.5) | 63 (5.4) | |
| Unknown | 1 | 1 | |
| Neoadjuvant therapy | n = 946 | n = 1170 | |
| Chemotherapy | 100 (10.6) | 117 (10) | 0.679 |
| Endocrine therapy | 34 (3.6) | 50 (4.3) | |
| None | 812 (85.8) | 1003 (85.7) | |
| Surgery | n = 943 | n = 1170 | |
| Lumpectomy for single lesion | 759 (80.5) | 1009 (86.2) | 0.002 |
| Mammoplasty involving skin/volume reduction | 164 (17.4) | 142 (12.1) | |
| Lumpectomy for multiple lesions | 4 (0.4) | 8 (0.7) | |
| Other | 16 (1.7) | 11 (0.9) | |
| Unknown | 3 | - | |
| Concurrent axillary surgery | n = 935 | n = 1168 | |
| No | 225 (24.1) | 328 (28.1) | 0.095 |
| Sentinel node biopsy | 658 (70.4) | 784 (67.1) | |
| Axillary clearance | 52 (5.6) | 56 (4.8) | |
| Unknown | 11 | 2 |
Values in parentheses are percentages unless indicated otherwise; *values are mean(s.d.), †values are median (i.q.r.). DCIS, ductal carcinoma in situ. ‡t–test was used for Age, Mann–Whitney U test was used for BMI, mammogram, ultrasound, and Chi squared was used for all the others namely Tis, N0, Invasive ductal and lobular, chemotherapy, lumpectomy for single lesion, concurrent axillary surgery (No).