Table 1 Demographic and clinical characteristics of the study population (n = 1934)
|  | Premenopause (N = 1184) | Postmenopause (N = 750) | p |
|---|---|---|---|
Age, mean (SD), y | 43.22 (5.65) | 57.86 (6.73) | p < 0.01 |
BMI (kg/m2), n | p < 0.01 | ||
 ≤ 24 | 824 | 441 |  |
 > 24 | 360 | 309 |  |
Smoking, n | p = 0.204 | ||
 Yes | 15 | 5 |  |
 No | 1169 | 745 |  |
Preoperative hypertension, n | p < 0.01 | ||
 Yes | 41 | 68 |  |
 No | 1143 | 682 |  |
Preoperative hyperlipidemia, n | p < 0.01 | ||
 Yes | 382 | 452 |  |
 No | 802 | 298 |  |
Tumor location, n | p = 0.651 | ||
 Left breast | 619 | 400 |  |
 Right breast | 565 | 350 |  |
TNM stage, n | p = 0.388 | ||
 Stage I | 417 | 253 |  |
 Stage II | 743 | 487 |  |
 Stage III | 24 | 10 |  |
Surgical procedures, n | p < 0.01 | ||
 Mastectomy | 985 | 713 |  |
 Breast conserving operation | 146 | 31 |  |
 Breast reconstruction | 53 | 6 |  |
Molecular subtyping, n | p < 0.01 | ||
 LuminaA | 73 | 45 |  |
 LuminaB | 160 | 173 |  |
 Triple negative | 139 | 77 |  |
 Her-2 positive | 812 | 455 |  |