Table 1. Patient characteristics of non-anemia and anemia group.
| Variables | Non-anemia (N = 1388) |
Anemia (N = 363) |
P-value |
|---|---|---|---|
| Age (years) | 59.07 ± 12.44 | 69.21 ± 11.20 | < 0.001 |
| Male sex (%) | 1198 (86.3) | 249 (68.6) | < 0.001 |
| BMI (kg/m2) | 25.66 ± 3.71 | 25.45 ± 5.01 | 0.771 |
| Diabetes (%) | 440 (31.7) | 178 (49.0) | < 0.001 |
| Current smoker (%) | 735 (53.0) | 118 (32.5) | < 0.001 |
| Hypertension (%) | 776 (55.9) | 251 (69.1) | < 0.001 |
| Prior MI (%) | 92 (6.6) | 35 (9.6) | 0.053 |
| Prior stroke (%) | 84 (6.1) | 38 (10.5) | 0.005 |
| CKD stage ≧ 3 | 352 (25.4) | 235 (64.7) | < 0.001 |
| ESRD on maintenance hemodialysis (%) | 12 (0.9) | 42 (11.6) | < 0.001 |
| Advanced heart failure (%) | 103 (7.4) | 54 (14.9) | < 0.001 |
| SBP (mmHg) | 133.57 ± 33.27 | 126.22 ± 36.83 | < 0.001 |
| Killip level ≧ III (%) | 282 (20.4) | 143 (39.4) | < 0.001 |
| Chest pain-to-ER time (minutes) | 212.37 ± 249.68 | 260.93 ± 159.73 | 0.006 |
| Door-to-balloon time (minutes) | 100.10 ± 83.75 | 121.56 ± 45.08 | < 0.001 |
| Reperfusion time (minutes) | 19.84 ± 11.88 | 19.56 ± 11.50 | 0.686 |
| Pain-to-reperfusion time (minutes) | 312.29 ± 267.96 | 381.18 ± 287.71 | < 0.001 |
| White blood cell count(x103) | 11.6 ± 4.0 | 11.0 ± 5.3 | 0.020 |
| Hemoglobin (g/L) | 15.1 ± 1.4 | 11.1 ± 1.5 | < 0.001 |
| Blood fasting sugar (mg/dL) | 151.3 ± 71.5 | 171.6 ± 104.6 | < 0.001 |
| HbA1C (%) | 6.95 ± 2.47 | 7.02 ± 1.90 | 0.659 |
| Creatinine (except ESRD) (mg/dL) | 1.23 ± 1.02 | 2.48 ± 2.89 | < 0.001 |
| Total cholesterol (mg/dL) | 186.21 ± 43.32 | 164.23 ± 42.69 | < 0.001 |
| LDL-cholesterol (mg/dL) | 119.44 ± 50.20 | 100.69 ± 36.32 | < 0.001 |
| HDL (mg/dL) | 42.01 ± 11.49 | 41.23 ± 12.30 | 0.273 |
| Troponin-I (ng/mL) | 5.28 ± 16.45 | 10.13 ± 27.93 | < 0.001 |
| CK-MB (ng/mL) | 24.53 ± 55.04 | 31.43 ± 63.75 | 0.047 |
| LVEF (%) | 57.77 ± 13.78 | 55.78 ± 13.74 | 0.018 |
| Anterior wall infarction (%) | 772 (55.5) | 178 (49.0) | 0.258 |
| Multiple vessel disease | 846 (61.0) | 264 (72.7) | < 0.001 |
| Left main disease (%) | 80 (5.8) | 29 (8.0) | 0.142 |
| IABP (%) | 225 (16.2) | 93 (25.6) | < 0.001 |
| ECMO (%) | 45 (3.2) | 16 (4.4) | 0.265 |
| ACEI/ARBs | 1208 (87.1) | 276 (76.2) | < 0.001 |
| Beta-blockers | 1035 (74.6) | 218 (60.2) | < 0.001 |
| Statins | 1021 (73.6) | 209 (57.7) | < 0.001 |
| Post PCI acute kidney injury (%) | 89 (6.4) | 56 (15.4) | < 0.001 |
| The need of blood transfusion with PRBC > 2 units (%) | 0 (0) | 47 (12.9) | < 0.001 |
Data are expressed as mean ± SD or as number (percentage). Abbreviation: MI: myocardial infarction; CKD: chronic kidney disease; BMI: body mass index; ESRD: end stage renal disease; SBP: systolic blood pressure; HbA1C: glycohemoglobin; LDL: low density lipoprotein; HDL: high density lipoprotein; LVEF: left ventricular ejection fraction; ACEI: angiotensin converting enzyme inhibitor; ARB: angiotensin receptor blocker; PRBC: packed red blood cells.