Table 1.
Comparison of patient and tumor characteristics for 3 margin assessment methods.
| Perpendicular (n=140) | Tangential (n=124) | Cavity-Shave (n=291) | ||
|---|---|---|---|---|
|
| ||||
| Median (range) | Median (range) | Median (range) | p-value | |
| Age, years | 63 (25–84) | 60 (31–86) | 61 (30–92) | 0.16 |
| Tumor size (invasive component), cm | 1.3 (0.1–6.0) | 1.2(0.2–4.2) | 1.2(0.1–5.5) | 0.61 |
|
| ||||
| N (%) | N (%) | N (%) | ||
|
| ||||
| AJCC T stage | 0.55 | |||
| T1 | 113 (81%) | 97 (78%) | 254 (87%) | |
| T2 | 21 (15%) | 20 (16%) | 36 (12%) | |
| T3 | 1 (0.7%) | 0 | 1 (0.3%) | |
| Unknown | 5 (4%) | 7 (6%) | 0 | |
| Extensive intraductal component (> 25% DCIS) | 0.40 | |||
| No | 116 (83%) | 88 (71%) | 256 (88%) | |
| Yes | 21 (15%) | 17 (14%) | 34 (12%) | |
| Unknown | 3 (2%) | 19 (15%) | 1 (0.3%) | |
| Lymphovascular invasion | 0.02 | |||
| No | 112 (80%) | 113 (91%) | 231 (79%) | |
| Yes | 28 (20%) | 11 (9%) | 57 (20%) | |
| Unknown | 0 | 0 | 3 (1%) | |
| Multifocality | 0.007 | |||
| No | 114 (81%) | 111 (90%) | 266 (91%) | |
| Yes | 26 (19%) | 13 (10%) | 24 (8%) | |
| Unknown | 0 | 0 | 1 (0.3%) | |
AJCC, American Joint Committee on Cancer Staging System, 7th edition, 2010; DCIS, ductal carcinoma in situ
*
Kruskal-Wallis tests used for continuous variable comparisons. Chi-squared and Fisher’s exact tests used for categorical variable comparisons where appropriate. All comparisons exclude unknown values.