Table 1. Clinical characteristics of the study population.
| Poor CCC (n:50) | Good CCC (n:52) | p-value | |
|---|---|---|---|
| Male, n(%) | 35(70) | 38(73) | 0.80 |
| Age, years, mean (SD) | 60.47(8.06) | 59.04(8.96) | 0.47 |
| BMI, mean (SD), kg/m2 | 24.28(1.61) | 24.12(1.62) | 0.67 |
| Current smoker, n (%) | 15(30) | 26(50) | 0.11 |
| DM, n (%) | 15(30) | 16(31) | 0.94 |
| Hypertension, n (%) | 10(20) | 13(25) | 0.79 |
| Systolic blood pressure, mean (SD), mm Hg | 122.77(10.32) | 125.87(11.24) | 0.22 |
| Diastolic blood pressure, mean (SD), mm Hg | 74.37(8.50) | 74.65(8.63) | 0.88 |
| Heart rate, mean (SD), beat/min | 76.93(13.95) | 76.69(13.61) | 0.94 |
| LVEF, (%), mean (SD) | 55.80(8.18) | 53.77(8.12) | 0.28 |
| Statins usage, n (%) | 10(20) | 11(21.1) | 0.78 |
| β-Blocker usage, n (%) | 11(22.2) | 13(25) | 0.88 |
| Nitrate usage, n (%) | 3(6) | 3(5.7) | 0.93 |
| Angiotensin converting enzyme inhibitor usage, n (%) | 9(18) | 8(15.3) | 0.74 |
| Angiotensin receptor blocker usage, n (%) | 11(22.2) | 7(13.5) | 0.22 |
| Calcium channel blocker usage, n (%) | 10(20) | 7(13.5) | 0.53 |
CCC: coronary collateral circulation; SD: standard deviation; BMI: body mass index; DM: diabetes mellitus; LVEF: left ventricular ejection fraction.