Single-photon-emission computed-tomography (SPECT) thallium is a non-invasive diagnostic test used to diagnose coronary artery disease (CAD). SPECT thallium test was performed on 2688 patients. CAD is diagnosed when stenosis exceeds 50% of the artery, as evaluated by coronary angiography (gold standard). Only 471 patients underwent the coronary angiography for verification of the CAD status. The rest of the patients were unverified (82.5%).
cad_pvbA data frame with 2688 rows and five variables:
SPECT thallium test, \(T\): Binary, 1 = Positive, 0 = Negative
CAD, \(D\): Binary, 1 = Yes, 0 = No
Gender (covariate), \(X_1\): Binary, 1 = Male, 0 = Female
Stress mode (covariate), \(X_2\): Binary, 1 = Dipyridamole (Medication for stress test when the patient is unable to exercise), 0 = Exercise
Age (covariate), \(X_3\): Binary, 1 = 60 years and above, 0 = Below 60 years