Baseline Characteristics
| After hours (n=906) | Working hours (n=758) | p Value | |
| Clinical characteristics | |||
| Mean age (SD), years | 60.3 (13.2) | 61.5 (12.7) | 0.07 |
| Sex (% female) | 22.2 | 26.0 | 0.07 |
| Ejection fraction (%) | 0.08 | ||
| <35 | 6.9 | 6.9 | |
| 35–50 | 29.9 | 29.2 | |
| >50 | 49.9 | 47.2 | |
| LV not done | 10.7 | 14.6 | |
| Missing | 2.5 | 2.1 | |
| Congestive heart failure (%) | 11.9 | 10.6 | 0.38 |
| Peripheral vascular disease (%) | 4.4 | 4.0 | 0.64 |
| Chronic pulmonary disease (%) | 6.8 | 9.4 | 0.06 |
| Cerebrovascular disease (%) | 4.5 | 4.2 | 0.76 |
| Creatinine >200 mmol/l (%) | 4.0 | 2.5 | 0.09 |
| Dialysis dependent (%) | 1.0 | 0.5 | 0.29 |
| Diabetes (%) | 15.9 | 15.7 | 0.91 |
| Hypertension (%) | 50.0 | 47.9 | 0.39 |
| Hyperlipidaemia (%) | 45.8 | 45.4 | 0.86 |
| Liver/gastrointestinal disease (%) | 2.7 | 3.4 | 0.35 |
| Malignancy (%) | 3.0 | 2.9 | 0.92 |
| Previous coronary artery bypass grafting (CABG) (%) | 1.8 | 1.3 | 0.46 |
| Previous myocardial infarction (MI) (%) | 10.7 | 13.7 | 0.06 |
| Previous percutaneous coronary intervention (PCI) (%) | 3.5 | 3.7 | 0.86 |
| Procedural characteristics | |||
| Coronary anatomy (%) | 0.79 | ||
| One-vessel disease | 38.5 | 38.9 | |
| Two-vessel disease | 31.0 | 29.0 | |
| Three-vessel disease | 26.6 | 28.4 | |
| Left main | 3.9 | 3.7 | |
| Vessel intervened (%) | 0.77 | ||
| Right coronary | 44.4 | 44.6 | |
| Circumflex | 12.9 | 14.0 | |
| Left anterior descending | 42.4 | 41.0 | |
| Left mainstem | 0.3 | 0.3 | |
| Saphenous vein graft | 0.0 | 0.1 | |
| Glycoprotein IIb/IIIa inhibitor (%) | 73.2 | 74.7 | 0.49 |
| Stent use (%) | 92.3 | 90.5 | 0.20 |
| Intra-aortic balloon pump (IABP, %) | 6.1 | 11.6 | <0.0001 |
| Inotrope use (%) | 2.4 | 1.1 | 0.036 |
| IABP+inotrope (%) | 7.6 | 12.0 | 0.003 |