Table 5.
Initial MCS Model
| 95% Confidence Interval | |||
| Variables | Coefficient | Lower Limit | Upper Limit |
| Mean patient age (per 1 year increment) | 0.08 | 0.04 | 0.13 |
| Male gender | 0.14 | -3.07 | 3.36 |
| Caucasian race | -0.69 | -1.51 | 0.12 |
| Hx of MI | -1.19 | -2.36 | -0.02 |
| Hx of Chronic heart failure | 0.01 | -1.05 | 1.07 |
| Hx of Coronary artery bypass graft surgery | 0.27 | -0.94 | 1.48 |
| Hx of Percutaneous coronary intervention | 0.49 | -0.76 | 1.75 |
| Substance or alcohol abuse | -2.27 | -3.92 | -0.62 |
| Current smoker | -0.51 | -1.70 | 0.67 |
| Dementia | -2.80 | -6.71 | 1.10 |
| COPD | -1.14 | -2.15 | -0.12 |
| Stroke | -2.10 | -4.78 | 0.58 |
| Depression | -1.13 | -2.56 | 0.30 |
| Arthritis | -11.68 | -13.60 | -9.76 |
| Diabetes mellitus | -0.49 | -1.55 | 0.57 |
| Coronary revascularization during index admission | 1.09 | -0.17 | 2.35 |
| Cardiogenic shock | -2.68 | -8.31 | 2.95 |
| Hypotensive episode | -0.09 | -2.52 | 2.33 |
| Positive stress test | -0.01 | -2.44 | 2.43 |
| Admitted to Tertiary VA | 0.02 | -1.37 | 1.40 |
| ST-segment elevation MI on ECG | 1.88 | 0.64 | 3.12 |
| Mean serum creatinine (per 1 mg/dL increment) | -0.34 | -1.00 | 0.32 |
| Left bundle branch block on ECG | -1.87 | -4.72 | 0.97 |
| Cardiac catheterization during index admission | -0.40 | -1.62 | 0.81 |
| Discharge diagnosis Unstable Angina (vs. MI) | 0.24 | -0.97 | 1.46 |
| Inverse Mills Ratio * | |||
* Inverse Mills Ratio: Variable derived from the Heckman Selection Equation; MI: myocardial infarction; Hx: History; COPD: chronic obstructive pulmonary disease; ECG: electrocardiogram