Table 1.
Clinicopathological characteristics between the HER2- positive and HER2-negative groups
| Variable | Overall (n = 148) | HER2(−) (n = 74) | HER2(+) (n = 74) | p value |
|---|---|---|---|---|
| Age (year) | 49.68 ± 10.64 | 50.47 ± 11.15 | 49.04 ± 10.11 | 0.414 |
| Diameter (cm) | 3.42 ± 1.37 | 3.35 ± 1.20 | 3.48 ± 1.52 | 0.736 |
| Affected side | ||||
| Right | 64 (43.2) | 30 (40.5) | 34 (45.9) | 0.507 |
| Left | 84 (56.4) | 44 (59.5) | 40 (54.1) | |
| T stage | ||||
| 1 | 9 (6.0) | 5 (6.7) | 4 (5.4) | 0.235 |
| 2 | 55 (37.2) | 26 (35.1) | 29 (39.2) | |
| 3 | 30 (20.3) | 11 (14.9) | 19 (25.7) | |
| 4 | 54 (36.5) | 32 (43.2) | 22 (29.7) | |
| N stage | ||||
| 0 | 20 (13.5) | 11 (14.9) | 9 (12.1) | 0.967 |
| 1 | 64 (43.2) | 31 (41.9) | 33 (44.6) | |
| 2 | 26 (17.6) | 13 (17.5) | 13 (17.6) | |
| 3 | 38 (25.7) | 19 (25.7) | 19 (25.7) | |
| M stage | ||||
| 0 | 136 (91.9) | 68 (91.9) | 68 (91.9) | 1.00 |
| 1 | 12 (8.1) | 6 (8.1) | 6 (8.1) | |
| cTNM | ||||
| 1 | 4 (2.7) | 2 (2.7) | 2 (2.7) | 0.685 |
| 2 | 44 (29.7) | 25 (33.8) | 19 (25.7) | |
| 3 | 79 (53.4) | 36 (48.6) | 43 (58.1) | |
| 4 | 21 (14.2) | 11 (14.9) | 10 (13.5) | |
| Ki 67 | ||||
| 0.37 ± 0.20 | 0.35 ± 0.23 | 0.38 ± 0.18 | 0.360 |
Numerical data are presented as the mean ± SD. Nonnumerical data are presented as the number of patients (percentage). The p value was analysed between HER2-negative group and the HER2-positive group
HER2 human epidermal growth factor receptor 2, cTNM clinical TNM stage