Table 2. Clinical characteristics of patients with acute coronary syndrome by quartiles of serum Mg level.
| Serum Mg level (mM) | |||||
| Characteristics | Q1 | Q2 | Q3 | Q4 | P value |
| Clinical presentation | |||||
| Unstable angina | 54(54) | 42 (44.2) | 60 (56.1) | 77 (68.8) | 0.005 |
| Myocardial infarction | 46(46) | 53 (55.8) | 47 (43.9) | 35 (31.2) | |
| Renal failure | 0 | 0 | 0 | 1 | |
| Chronic heart failure | 1 | 0 | 1 | 0 | |
| Use of diuretics drugs | 1 | 0 | 1 | 0 | |
| Previous acute myocardial infarction | 6 | 3 | 7 | 5 | |
| Previous coronary artery bypass grafting | 0 | 0 | 0 | 0 | |
| Previous percutaneous coronary intervention | 1 | 1 | 2 | 2 | |
| Left ventricular ejection fraction | 0.57±0.13 | 0.58±0.09 | 0.59±0.12 | 0.61±0.09 | 0.35 |
| Diseased coronary artery | |||||
| Left main | 2(2) | 1(1.1) | 2(1.9) | 2(1.8) | |
| Single vessel | 43(43) | 40(42.1) | 52(48.6) | 39(34.8) | 0.23 |
| Multi-vessels | 57(57) | 55(57.9) | 55(51.4) | 73(65.2) | |
| Bifurcations | 15(15) | 10(10.5) | 10(9.3) | 20(17.9) | 0.23 |
| Stent number per patient | |||||
| 1–2 | 67(67) | 67(70.5) | 85(79.4) | 74(66.1) | 0.12 |
| >3 | 33(33) | 28(29.5) | 22(20.6) | 38(33.9) | |
Data are no. (%) unless indicated.