Table 5.
Kaplan-Meier analysis of relapse-free survival
| Characteristics | Relapse-free time [weeks] | 5-year relapse-free rate [%] | ||||
|---|---|---|---|---|---|---|
| Mean | SD | 95% CI | p-value | |||
| GPER-1 | 0.637 | |||||
| Positive (≥ 4) | 268.2 | 9.1 | 250.3–286.1 | 77.8 | ||
| Negative (< 4) | 260.8 | 9.3 | 242.6–278.9 | 75.8 | ||
| BMI [kg/m2] | 0.157 | |||||
| Obese (BMI ≥ 30) | 251.6 | 13.5 | 225.2–278.0 | 66.9 | ||
| Non-obese (BMI < 30) | 269.0 | 7.5 | 254.4–283.7 | 80.7 | ||
| Tumour size | 0.279 | |||||
| ≤ 2 cm | 269.0 | 7.6 | 254.1–283.9 | 81.8 | ||
| > 2 cm | 259.4 | 10.5 | 238.9–280.0 | 73.2 | ||
| Lymph node status | 0.001 | |||||
| pN0, pN1 | 275.9 | 6.3 | 263.5–288.2 | 45.2 | ||
| pN2, pN3 | 196.5 | 19.8 | 157.8–235.3 | 82.1 | ||
| Grading | 0.145 | |||||
| G1 | 232.8 | 24.7 | 184.3–281.3 | 55.1 | ||
| G2 | 273.1 | 8.1 | 257.2–289.0 | 82.9 | ||
| G3 | 251.4 | 12.7 | 226.4–276.4 | 69.0 | ||
| Operations | 0.028 | |||||
| Ablatio | 270.5 | 6.7 | 257.5–283.6 | 80.8 | ||
| Others | 212.9 | 20.4 | 172.9–252.9 | 40.5 | ||
| Axilla | ||||||
| Dissection (y/n) | 235.0 | 15.6 | 204.4–265.7 | 0.004§ | 58.4 | |
| SNB (y/n) | 273.2 | 7.4 | 259.0–287.4 | 0.028§ | 83.2 | |
| Dissection + SNB (y/n) | 286.4 | 13.0 | 260.9–311.9 | 0.233§ | 90.9 | |
| Radiotherapy | 0.549 | |||||
| Yes | 259.8 | 9.5 | 240.9–278.2 | 71.9 | ||
| No | 259.6 | 10.0 | 240.2–279.3 | 79.8 | ||
GPER-1 - G protein-coupled oestrogen receptor 1, BMI – body mass index, § – p-value was calculated vs. all other cases
Relapse-free survival in weeks and 5-year survival rate is given. P-value was caluclated using the log-rank test