TABLE 2.
Demographic, Clinical, and Procedural Characteristics of the Study Population
| Characteristics | PMI (n = 52) | No PMI (n = 382) | P* |
|---|---|---|---|
| Age, y | 63.7 (11.1) | 62.1 (11.1) | 0.31 |
| Female, % | 32.7 | 34.2 | 0.88 |
| History of MI, % | 38.5 | 40.8 | 0.77 |
| Unstable angina, % | 63.0 | 61.7 | 0.87 |
| Congestive heart failure, % | 17.4 | 23.8 | 0.36 |
| Diabetes, % | 36.5 | 29.2 | 0.33 |
| Hypertension, % | 63.5 | 62.1 | 0.88 |
| History of stroke, % | 4.3 | 2.9 | 0.64 |
| Peripheral vascular disease, % | 15.2 | 13.3 | 0.82 |
| Body surface area, m2 | 2 (0.2) | 2 (0.2) | 0.56 |
| Body mass index, kg/m2 | 29 (5) | 29 (6) | 0.66 |
| LVEF, % | 53 (13) | 53 (12) | 0.76 |
| Preoperative hematocrit, % | 39.5 (4.3) | 38.8 (8.4) | 0.39 |
| Parsonnet risk score | 11.5 (9.7) | 8.6 (7.4) | 0.07 |
| No. of grafts | 3 (1.5) | 2.6 (1.3) | 0.07 |
| Duration of CPB, min | 154 (57) | 124 (54) | < 0.0001 |
| Duration of cross-clamp, min | 95 (44) | 69 (35) | < 0.0001 |
| Procedure | |||
| CABG, % | 76.9 | 81.3 | 0.22 |
| CABG + valve, % | 11.5 | 5.3 | |
| Valve, % | 11.5 | 13.4 | |
| Redo CABG, % | 13.0 | 3.7 | 0.02 |
| Intraoperative inotropes, % | 26.9 | 12.5 | 0.008 |
| Self-reported ethnicity: | |||
| African American | 11.5 | 10.3 | 0.34 |
| European American | 80.8 | 85.8 | |
| Native American | 7.7 | 3.2 | |
| Other | 0.0 | 0.8 | |
Values expressed as mean (SD) or as %.
*
Wilcoxon rank-sum (continuous variables); exact Pearson χ2 (categorical variables).
LVEF indicates left ventricular ejection fraction; CPB, cardiopulmonary bypass; CABG, coronary artery bypass grafting.