Table 1.
Clinical characteristics and molecular subtypes in the study population.
| Characteristics | n | % |
|---|---|---|
| Tumor size | ||
| ≤2 cm | 391 | 37.6 |
| 2–5 cm | 553 | 53.2 |
| >5 cm | 96 | 9.2 |
| Axillary lymph nodes | ||
| Negative | 531 | 51.1 |
| Positive | 509 | 48.9 |
| TNM stage | ||
| Early (I + II) | 465 | 44.7 |
| Advanced (III) | 575 | 55.3 |
| Pathological diagnosis | ||
| Ductal carcinoma | 849 | 81.6 |
| Lobular carcinoma | 93 | 8.9 |
| Others | 98 | 9.4 |
| Tumor site | ||
| Left | 535 | 51.4 |
| Right | 505 | 48.6 |
| Molecular subtype | ||
| Luminal A | 529 | 50.9 |
| Luminal B | 177 | 17.0 |
| Her2+ | 111 | 10.7 |
| TN | 223 | 21.4 |
| BMI group | ||
| UW | 66 | 6.3 |
| NW | 642 | 61.7 |
| OW | 277 | 26.6 |
| OB | 55 | 5.3 |
TNM, tumor-node-metastasis; Her2, human epidermal growth factor receptor 2; TN, triple-negative; BMI, body mass index; UW, underweight; NW, normal weight; OW, overweight; OB, obese.