Table 1 Multivariable fractional polynomial functions and logarithm hazard ratios for breast cancer-specific survival using SEER variables
From: Development of a prediction model for breast cancer based on the national cancer registry in Taiwan
Variables | Function | logHR | P value |
|---|---|---|---|
Continuous variables | |||
Age1 | (age/100)−0.5 | − 13.05 | < 0.001 |
Age2 | (age/100)−0.5 × log(age/100) | 10.42 | < 0.001 |
Tumor size, mm | log(size/10) | 0.8375 | < 0.001 |
Node-positive ratio | ((ratio + 0.1)/0.1)0.5 | 0.7076 | < 0.001 |
Categorical variables | |||
Chemotherapy | |||
Without | – | – | – |
With | – | − 0.4792 | < 0.001 |
Radiotherapy | |||
Without | – | – | – |
With | – | − 0.3316 | < 0.001 |
Grade | |||
1 | – | – | – |
2 | – | 0.6106 | 0.003 |
3 | – | 1.059 | < 0.001 |
Subtype | |||
Luminal-like | – | – | – |
HER2 | – | 0.3185 | < 0.001 |
Triple negative | – | 1.426 | < 0.001 |
Pathological stage | |||
1 | – | – | – |
2 | – | 0.6073 | < 0.001 |
3 | – | 1.076 | < 0.001 |
4 | – | 2.044 | < 0.001 |