Table 5 The meaning and assignment method of variables
Factors | Meaning | Assignment |
|---|---|---|
y | Prognosis | y = 1 death, y = 0 survival |
x1 | Age | > 60 = 1, ≤ 60 = 0 |
x2 | Sex | Male = 1, female = 0 |
x3 | Tumor size | > 5 cm = 1, ≤ 5 cm = 0 |
x4 | Differentiation degree | Medium/high differentiation = 1, low differentiation = 0 |
x5 | TNM staging | III-IV stage = 1, I-II stage = 0 |
x6 | Lymph node metastasis | Yes = 1, no = 0 |
x7 | Perineural invasion | Yes = 1, no = 0 |
x8 | Surgery type | Non-simple cholecystectomy = 1, simple cholecystectomy = 0 |
x9 | CEA | Continuous variable (ng/mL) |
x10 | CA125 | Continuous variable (U/mL) |
x11 | CA19-9 | Continuous variable (U/mL) |
x12 | SII | Continuous variable |