Table 1 Baseline clinical and diagnostic characteristics of the study population. Apex ischemia was defined based on SPECT imaging showing reduced perfusion (>10% decrease compared to normal tissue) in the apical segment. Multi-vessel disease was confirmed by CAG showing>50% stenosis in \(\geqslant\)2 major epicardial coronary arteries. Demographic and clinical parameters were collected through standardized electronic health records, with risk factors defined according to current clinical guidelines (Dev.: Development; Val.: Validation).
Basic characteristics | CAG group characteristics | SPECT group characteristics | |||||
|---|---|---|---|---|---|---|---|
Total = 2426 | Total = 1180 | Dev. | Val. | Total = 446 | Dev. | Val. | |
Age range | 30-85 | IHD negative | 151 | 41 | IHD negative | 243 | 52 |
Male | 1693 | IHD positive | 894 | 94 | IHD positive | 127 | 24 |
Female | 733 | LAD stenosis\(\ge\)70% | 609 | 75 | Myocardial perfusion defect > 10% | 25 | 6 |
BMI range | 24.6±3.7 | LCX stenosis\(\ge\)70% | 416 | 41 | Apex ischemia | 51 | 10 |
Hypertension | 658 | RCA stenosis\(\ge\)70% | 427 | 50 | Anterior wall ischemia | 45 | 8 |
Diabetes | 112 | 1-vessel disease | 391 | 37 | Septal wall ischemia | 34 | 7 |
Current smoker | 338 | 2-vessel disease | 262 | 28 | Inferior wall ischemia | 53 | 7 |
Family history | 290 | 3-vessel disease | 179 | 29 | Lateral wall ischemia | 44 | 7 |
