Table 1. Baseline characteristics.
| Baseline characteristics | Reference | Anemia only | Renal impairment only | Both anemia and renal impairment | p-value for differences across groups |
| Total (n) | 4346 | 990 | 384 | 309 | |
| Age (yr [SD]) | 61.8 (11.3) | 66.3 (11.1) | 71.5 (9.3) | 72.4 (10.1) | <0.001 |
| Men (n [%]) | 3445 (79.3) | 716 (72.3) | 224 (58.3) | 163 (52.8) | <0.001 |
| BMI (mean [SD]) | 27.4 (4.2) | 26.4 (4.4) | 27.8 (4.8) | 27.6 (4.8) | <0.001 |
| Hypertension (n [%]) | 2407 (55.5) | 575 (58.6) | 273 (71.5) | 221 (71.8) | <0.001 |
| Dyslipidemia (n [%]) | 2401 (55.4) | 487 (49.6) | 203 (53.1) | 137 (44.5) | <0.001 |
| Diabetes mellitus (n [%]) | 644 (14.9) | 227 (23.1) | 92 (24.1) | 99 (32.1) | <0.001 |
| Smoking at baseline (n [%]) | 2385 (55.0) | 463 (47.1) | 147 (38.5) | 103 (33.4) | <0.001 |
| Left ventricular ejection fraction, <30% (n [%]) | 77 (1.8) | 28 (3.1) | 18 (5.2) | 17 (6.5) | <0.001 |
| Acute coronary syndrome (n [%]) | 2281 (52.5) | 640 (64.6) | 163 (42.6) | 152 (49.2) | <0.001 |
| ST-elevation MI (n [%]) | 1202 (52.8) | 365 (57.0) | 91 (56.2) | 63 (41.7) | 0.006 |
| Second generation stent (n [%]) | 1450 (33.4) | 406 (41.0) | 110 (28.6) | 131 (42.4) | <0.001 |
| Type of stent (n [%]) | <0.001 | ||||
| PES | 961 (22.1) | 186 (18.8) | 89 (23.2) | 58 (18.8) | |
| SES | 1935 (44.5) | 398 (40.2) | 185 (48.2) | 120 (38.8) | |
| ZES | 498 (11.5) | 107 (10.8) | 41 (10.7) | 44 (14.2) | |
| EES | 952 (21.9) | 299 (30.2) | 69 (18.0) | 87 (28.2) | |
| Hgb on admission (mean [SD]) | 144.5 (11.2) | 115.6 (12.0) | 140.5 (11.6) | 109.8 (11.8) | <0.001 |
| Htc on admission (mean [SD]) | 0.4 (1.0) | 0.3 (0.0) | 0.4 (0.0) | 0.3 (0.0) | 0.001 |
| Creatinine (mean [SD]) | 76.4 (14.6) | 75.7 (16.1) | 133.5 (78.0) | 175.9 (136.0) | <0.001 |
Reference category: No anemia and no renal impairment.