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Table 1 Prognostic elements of breast cancer survivability (SEER).

From: A coupling approach of a predictor and a descriptor for breast cancer prognosis

Prognostic elements Description Number of distinct values / mean ± std.dev
Discrete
Variables
1 Race Ethnicity: White, Black, Chinese, etc. 16
  2 Radiation None, Beam Radiation, Radioisotopes, Refused, Recommended, etc. 6
  3 Primary Site Presence of tumor at particular location in body. Topographical classification of cancer. 9
  4 Histological Type Form and structure of tumor 30
  5 Behavior Code Normal or aggressive tumor behavior is defined using codes. 2
  6 Grade Appearance of tumor and its similarity to more or less aggressive tumors 5
  7 Site Specific Surgery Information on surgery during first course of therapy, whether cancer-directed or not. 12
  8 Stage Defined by size of cancer tumor and its spread 10
  9 Clinical Extension of tumor Defines the spread of the tumor relative to the breast 16
  10 Lymph Node
Involvement
None, (1-3) Minimal, (4-9) Significant, etc. 7
  11 Marital Status Married, Single, Divorced, Widowed, Separated 4
Continuous Variables 12 Age at Diagnosis Actual age of patient in years 63.64 ± 14.25
  13 Tumor Size 2-5 cm; at 5 cm, the prognosis worsens 116.78 ± 286.64
  14 Number of Positive
Nodes Examined
When lymph nodes are involved in cancer, they are known as positive. 27.29 ± 42.26
  15 Number of Nodes
Examined
The total number of (positive/negative) lymph nodes that were removed and examined by the pathologist. 13.61 ± 17.49
  16 Number of Primaries Number of primary tumors (1-6) 0.54 ± 1.29
Survivability Target binary variable defines class of survival of patient.