[Retracted] The Use of Hellinger Distance Undersampling Model to Improve the Classification of Disease Class in Imbalanced Medical Datasets

Table 3

The features of THS dataset.

No.	Attribute name	Data type
1	Diagnosis	Categorical
2	Forced vital capacity	Numeric
3	A volume that has been exhaled at the end of the first of forced expiration	Numeric
4	Performance status	Categorical
5	Pain before surgery	Categorical
6	Hemoptysis before surgery	Categorical
7	Dyspnoea before surgery	Categorical
8	Cough before surgery	Categorical
9	Weakness before surgery	Categorical
10	Size of the original tumour	Categorical
11	Type 2 diabetes mellitus	Categorical
12	Myocardial infarction up to six months	Categorical
13	Peripheral arterial diseases	Categorical
14	Smoking	Categorical
15	Asthma	Categorical
16	Age at surgery	Numeric
17	One-year survival period (class)	Categorical