Table 2.
Patient and tumor characteristics of triple-negative breast cancer.
| Characteristic (N) | Frequency (%) |
|---|---|
| Age (years) (200) | |
| Mean (SD) | 49.7 (11.9) |
| Median (range) | 48.5 (59) |
| Menstrual history (200) | |
| Premenopausal | 81 (40.5) |
| Perimenopausal | 16 (8) |
| Postmenopausal | 103 (51.5) |
| Marital status | |
| Married | 197 (98.5) |
| Unmarried | 3 (1.5) |
| Age at first childbirth (years) (99) | |
| 15–20 | 14 (14.1) |
| 21–25 | 51 (51.5) |
| 26–30 | 22 (22.2) |
| 31–35 | 1 (1) |
| Not yet | 11 (11.1) |
| Parity (150) | |
| Not yet | 9 (6) |
| 1 | 19 (12.7) |
| 2 | 57 (38) |
| 3 | 43 (28.7) |
| 4 or more | 22 (14.6) |
| Family history of cancer (149) | |
| Yes | 34 (22.8) |
| No | 115 (77.2) |
| Laterality (200) | |
| Right | 109 (54.5) |
| Left | 91 (45.5) |
| Tumor location (200) | |
| Upper outer quadrant | 103 (51.5) |
| Upper inner quadrant | 36 (18) |
| Lower outer quadrant | 19 (9.5) |
| Lower inner quadrant | 7 (3.5) |
| Central | 26 (13) |
| Multiple quadrants | 8 (4) |
| Axillary tail | 1 (0.5) |
| Stage (200) | |
| I | 11 (5.5) |
| II | 136 (68) |
| III | 43 (21.5) |
| IV | 10 (5) |
| Surgical procedure (189) | |
| MRM | 121 (64) |
| BCS | 68 (36) |
| Primary histology (200) | |
| IDC | 190 (95) |
| Metaplastic | 6 (3) |
| Others | 4 (2) |
| Grade (200) | |
| II | 27 (13.5) |
| III | 173 (86.5) |
| Lymph node status (189) | |
| Positive | 86 (45.5) |
| Negative | 103 (54.5) |
| Extracapsular extension (86) | |
| Present | 58 (67.4) |
| Absent | 28 (32.6) |
| Lymphovascular invasion (194) | |
| Present | 81 (41.8) |
| Absent | 113 (58.2) |
| Subtype (200) | |
| Basal-like | 101 (50.5) |
| Non-basal-like | 99 (49.5) |
| Recurrence (200) | |
| No | 168 (84) |
| Local | 2 (1) |
| Locoregional | 1 (0.5) |
| Distant | 29 (14.5) |
| Site of metastasis (29) | |
| Lung | 7 (24.2) |
| Liver | 5 (17.2) |
| Brain | 4 (13.8) |
| Others | 13 (44.8) |
| Vital status (200) | |
| Alive | 161 (80.5) |
| Dead | 39 (19.5) |
| Cause of death (39) | |
| Disease-related | 33 (84.6) |
| Non-disease-related | 6 (15.4) |
MRM, modified radical mastectomy; BCS, breast conservative surgery; IDC, infiltrating ductal carcinoma; SD, standard deviation.