Table 1.

Definition cardiac health

	Cardiac healthy	Any cardiac diseased
CT: coronary artery assessment
Any atherosclerotic plaque	Absent	Present
Any degree of stenosis	Absent	Present
CT: left ventricle assessment
Regional LV dysfunction	Absent	Present
Left ventricular hypertrophy	Absent	Present
SPECT: myocardial perfusion
Summed Stress Score (SSS)	0–3	≥4
Summed Difference Score (SDS)	0	≥1

To meet the definition ‘cardiac healthy’ by multi-modality imaging, all six aspects had to be satisfied. For the definition of ‘cardiac diseased’, all parameters were independent of each other in stratifying patients into the three different categories: coronary, left ventricle or perfusion abnormalities