Table 1 Baseline clinical characteristics of the 4714 study patients in relation to timing of coronary artery bypass surgery
| Â | All patients n = 4714 | Weekday n = 4661 | Weekend n = 53 | p value weekday vs. weekend | 7 am-4 pm n = 2624 | After 4 pm n = 65 | p value 7 am-4 pm vs. after 4 pm |
|---|---|---|---|---|---|---|---|
Age (years) | 65 ± 9 | 65 ± 10 | 68 ± 11 | 0.015 | 65 ± 9 | 65 ± 10 | 0.96 |
Male | 99% | 99% | 96% | 0.06 | 99% | 100% | 1.0 |
Current smoker | 22% | 22% | 30% | 0.17 | 23% | 30% | 0.21 |
Diabetes mellitus | 33% | 33% | 37% | 0.53 | 37% | 39% | 0.82 |
Prior MI | 53% | 53% | 73% | 0.005 | 50% | 59% | 0.18 |
Prior heart surgery | 8% | 8% | 11% | 0.44 | 6% | 3% | 0.59 |
Intra-aortic balloon pump | 3% | 3% | 32% | < 0.0001 | 3% | 29% | < 0.0001 |
ASA score | 3.2 ± 0.4 | 3.2 ± 0.4 | 3.6 ± 0.6 | < 0.0001 | 3.2 ± 0.4 | 3.4 ± 0.5 | 0.009 |
Mortality estimate | 3.6 ± 4 | 3.5 ± 4 | 11.4 ± 13 | < 0.0001 | 3.3 ± 4 | 5.9 ± 6 | 0.001 |
Hemoglobin | 13.7 ± 1.7 | 13.7 ± 1.7 | 11.9 ± 2.3 | < 0.0001 | 13.7 ± 1.7 | 13.7 ± 1.8 | 0.93 |
Creatinine | 1.3 ± 0.7 | 1.3 ± 0.7 | 1.3 ± 0.7 | 0.87 | 1.3 ± 0.7 | 1.3 ± 0.6 | 0.79 |
Albumin | 4.1 ± 0.5 | 4.1 ± 0.5 | 3.7 ± 0.7 | 0.06 | 4.1 ± 0.5 | 3.9 ± 0.5 | 0.10 |