Table 1 Baseline characteristics at initial presentation
|  | Total population (n = 51) | No-obstructive CAD (n = 17) | Obstructive CAD (n = 34) | P-value |
|---|---|---|---|---|
Age (years) | 63.1 ± 9.9 | 63.4 ± 9.5 | 63.0 ± 10.2 | 0.914 |
Male | 26 (51) | 5 (29) | 21 (62) | 0.029 |
BMI (kg/m2) | 27.4 ± 4.2 | 28.4 ± 4.3 | 26.8 ± 4.1 | 0.198 |
Concomitant vascular disease | ||||
 Stroke/TIA | 2 (4) | 0 (0) | 2 (6) | 0.547 |
 Peripheral vascular disease | 4 (8) | 1 (6) | 3 (9) | 1.000 |
Cardiovascular risk factors | ||||
 Hypertension | 21 (41) | 6 (35) | 15 (44) | 0.546 |
 Diabetes mellitus | 5 (10) | 0 (0) | 5 (15) | 0.156 |
 Hypercholesterolemia | 15 (29) | 4 (24) | 11 (32) | 0.746 |
 Positive family history | 27 (53) | 9 (53) | 18 (53) | 1.000 |
 Smoking | 21 (41) | 8 (47) | 13 (38) | 0.546 |
 Number of CAD risk factors | 1.8 ± 1.2 | 1.6 ± 1.0 | 1.8 ± 1.3 | 0.508 |
 GRACE risk score | 114 ± 22 | 115 ± 18 | 113 ± 24 | 0.801 |
Physical examination | ||||
 Heart rate (bpm) | 71 ± 15 | 72 ± 17 | 71 ± 14 | 0.808 |
 Systolic BP (mmHg) | 148 ± 22 | 141 ± 15 | 152 ± 24 | 0.096 |
 Diastolic BP (mmHg) | 81 ± 13 | 79 ± 14 | 83 ± 13 | 0.332 |
Laboratory assessment | ||||
 Hemoglobin (mmol/L) | 8.8 ± 0.7 | 8.9 ± 0.7 | 8.8 ± 0.8 | 0.894 |
 Creatinin (µmol/L) | 78 ± 15 | 76 ± 14 | 79 ± 16 | 0.537 |
 Baseline hs-cTnT (ng/L) | 53 (22–107) | 48 (21–136) | 56 (22–108) | 0.865 |
 Second hs-cTnT (ng/L) | 91 (34–212) | 47 (22–207) | 104 (42–213) | 0.294 |
 CK (U/L) | 148 (98–213) | 148 (100–210) | 146 (91–216) | 0.646 |
 CRP (mg/L) | 2 (< 1–5) | 4 (< 1–5) | 1 (< 1–4) | 0.095 |