| Molecular subtype | (20 - 35) | (35 - 50) | (51 - 65) | >65 | total | Chi-square test | ||
| No. (%) | No. (%) | No. (%) | No. (%) | No (%) | χ2 | P-value | Sig. | |
| HR+/Her− | 30 (40.5%) | 189 (54.8%) | 187 (55.2%) | 140 (57.4%) | 546 (54.5%) | 18.391 | 0.031 | S |
| HR+/Her+ | 20 (27.0%) | 70 (20.3%) | 51 (15.0%) | 42 (17.2%) | 183 (18.3%) | |||
| HER2 | 13 (17.6%) | 27 (7.8%) | 44 (13.0%) | 20 (8.2%) | 104 (10.3%) | |||
| TNBC | 11 (14.9%) | 59 (17.1%) | 57 (16.8%) | 42 (17.2%) | 169 (16.9%) | |||
| Total | 74 (7.4) | 345 (34.4) | 339 (33.8) | 244 (22.4) | 1002 (100%) | |||