Table 2. Baseline demographic and procedural characteristics for the CABG cohort.
| Total (n = 4388) |
SAG (n = 3358) |
MAG (n = 1030) |
p value | |
|---|---|---|---|---|
| Year of procedure | ||||
| 2004–2008 | 35.6 | 39.4 | 23.0 | <0.001 |
| 2009–2015 | 64.4 | 60.6 | 77.0 | |
| Clinical factors | ||||
| Age (years) | 66(58,74) | 69(61,75) | 62(55,68) | <0.001 |
| Female | 18.3 | 20.1 | 12.3 | <0.001 |
| PVD | 10.6 | 11.4 | 7.8 | 0.001 |
| Renal disease * | 2.2 | 2.5 | 1.1 | 0.006 |
| Previous CVA | 6.3 | 7.2 | 3.5 | <0.001 |
| Previous MI | 44.0 | 44.2 | 43.5 | 0.710 |
| Previous revascularization | 17.1 | 16.4 | 19.2 | 0.039 |
| Diabetes | 27.2 | 30.0 | 18.1 | <0.001 |
| Hypertension | 80.2 | 80.8 | 78.1 | 0.055 |
| Smoking † | 10.6 | 10.2 | 12.0 | 0.100 |
| Severe LV function (EF≤30%) | 4.7 | 5.4 | 2.7 | <0.001 |
| Presentation | ||||
| Stable | 62.9 | 62.0 | 65.9 | 0.023 |
| CCS | 3(2,3) | 3(2,3) | 3(2,3) | 0.234 |
| CCS 1–2 | 50.3 | 49.2 | 54.2 | 0.005 |
| CCS 3–4 | 49.7 | 50.8 | 45.8 | 0.005 |
| NYHA | 2(2,3) | 2(2,3) | 2(2,2) | <0.001 |
| NYHA 1–2 | 68.9 | 66.8 | 75.8 | <0.001 |
| NYHA 3–4 | 31.1 | 33.2 | 24.2 | <0.001 |
| Cardiogenic shock | 0.8 | 0.9 | 0.6 | 0.333 |
| Intubated | 0.3 | 0.4 | 0.2 | 0.417 |
| IABP use # | 7.8 | 8.5 | 4.9 | 0.009 |
| Coronary anatomy § | ||||
| LMS | 28.8 | 28.4 | 30.1 | 0.292 |
| Number of diseased vessels | 3(2,3) | 3(2,3) | 3(2,3) | 0.314 |
| Number of vessels treated | 2(2,3) | 3(2,3) | 3(2,3) | <0.001 |
Discrete variables are presented as percentages and compared using the Z-test (2-tailed); Continuous data presented as medians (25% IQ, 75% IQ) and compared using the Mann-Whitney U-test (2-tailed). All abbreviations are as for Table 1.