Table 1. Clinicopathologic Characteristics of Study Cohorta.
| Clinicopathologic features | Overall (n = 234) |
|---|---|
| Age, median (IQR), y | 49 (40-58) |
| Menopausal status | |
| Premenopausal | 126 (54) |
| Postmenopausal | 108 (46) |
| Race and ethnicity | |
| Asian | 35 (15) |
| Black | 29 (12) |
| Hispanic | 16 (7) |
| White | 126 (54) |
| Other/unknown | 28 (12) |
| Tumor size at presentation, median (IQR), cm | 3.0 (2.2-5.0) |
| SLNs retrieved, median (IQR) | 4 (3-5) |
| Histologic findings | |
| Ductal | 211 (90) |
| Lobular and mixed | 7 (3) |
| Micropapillary and mixed | 10 (4) |
| Other | 3 (1) |
| Occult | 3 (1) |
| Differentiation | |
| Well | 1 (0.5) |
| Moderate | 36 (15) |
| Poor | 196 (84) |
| Unknown | 1 (0.5) |
| Receptor status | |
| HR+/ERBB2− | 47 (20) |
| HR+/ERBB2+ | 80 (34) |
| HR−/ERBB2+ | 64 (28) |
| HR−/ERBB2− | 43 (18) |
| Breast surgery | |
| Breast-conserving surgery | 118 (50) |
| Mastectomy | 116 (50) |
| Breast pCR (ypT0/Tis) | 161 (69) |
Abbreviations; ERBB2, Erb-B2 receptor tyrosine kinase 2 (formerly HER2, human epidermal growth factor receptor 2); HR, hormone receptor; pCR, pathologic complete response; and SLNs, sentinel lymph nodes.
a
Frequency (No., %) reported for categorical variables and median (IQR) reported for continuous variables.