Table 2. Comparisons of serum marker levels according to various clinical/laboratory parameters.
| Variable | FSTL1 (pg/mL) Mean±SE | p-value |
|---|---|---|
| Grade | 0.091 | |
| I+II (good+medium) | 4,513 ± 273.8 | |
| III (poor) | 3,675 ± 433.0 | |
| Ki-67 | 0.039 | |
| ≤ 30 | 4,550 ± 242.1 | |
| > 30 | 3,607 ± 415.3 | |
| ER | 0.388 | |
| Negative | 3,920 ± 536.0 | |
| Positive | 4,362 ± 231.8 | |
| PR | 0.482 | |
| Negative | 3,973 ± 547.5 | |
| Positive | 4,340 ± 232.2 | |
| HER2 | 0.300 | |
| Negative | 4,507 ± 475.3 | |
| Positive | 3,753 ± 489.6 | |
| Classification | 0.767 | |
| Luminal | 4,226 ± 226.6 | |
| Others | 4,057 ± 665.3 | |
| Subtype I | 0.263 | |
| Triple-positive | 3,324 ± 958.6 | |
| Others | 4,265 ± 225.4 | |
| Subtype II | 0.573 | |
| HER2-enriched | 4,546 ± 913.0 | |
| Others | 4,150 ± 222.3 | |
| N status | 0.790 | |
| Negative | 4,242 ± 360.4 | |
| Positive | 4,370 ± 316.0 | |
| EGFR | 0.004 | |
| Negative | 4,772 ± 300.5 | |
| Positive | 3,412 ± 330.2 | |
| p53 | 0.300 | |
| Negative | 4,507 ± 475.3 | |
| Positive | 3,753 ± 489.6 |
FSTL1=follistatin-like protein 1; SE=standard error; ER=estrogen receptor; PR=progesterone receptor; HER2=human epidermal growth factor receptor 2; EGFR=epidermal growth factor receptor.