Table 1 The input and output factors/features under question.

From: A proposed tree-based explainable artificial intelligence approach for the prediction of angina pectoris

Variable/feature

Description

Type

Role

Status

Whether a woman turns out to have angina pectoris (0 = no, 1 = yes)

Categorical

Output

Age

Age of a woman

Continuous

Input

Smoke

Smoking status (1 = current-, 2 = ex-, 3 = non-smoker)

Categorical

Input

Cigarette

The current average number of cigarettes per day

Continuous

Input

Hyper

Hypertension (1 = absent, 2 = mild, 3 = moderate)

Categorical

Input

Angfam

Family history of angina (1 = yes.0 = no)

Categorical

Input

Myofam

Family history of myocardial infarction (1 = yes, 0 = no)

Categorical

Input

Strokefam

Family history of stroke (1 = yes, 0 = no)

Categorical

Input

Diabetes

Does a woman have diabetes mellitus? (1 = yes, 0 = no)

Categorical

Input