Table 2 Heckman Selection Model (N = 1605)
From: Assessing response bias from missing quality of life data: The Heckman method
| Â | Â | 95% Confidence Interval | |
|---|---|---|---|
Variables | Coefficient | Lower Limit | Upper Limit |
Mean patient age | 0.01 | 0.00 | 0.02 |
Male gender | 0.44 | -0.07 | 0.95 |
Caucasian race | -0.06 | -0.25 | 0.13 |
Hx of MI | 0.02 | -0.16 | 0.20 |
Hx of Chronic heart failure | -0.01 | -0.20 | 0.18 |
Hx of Coronary artery bypass graft surgery | 0.09 | -0.13 | 0.31 |
Hx of Percutaneous coronary intervention | 0.28 | 0.01 | 0.54 |
History of trauma** | -0.29 | -1.37 | 0.80 |
Substance or alcohol abuse | -0.21 | -0.40 | -0.01 |
Current smoker | -0.10 | -0.29 | 0.09 |
Dementia | 0.02 | -0.76 | 0.79 |
COPD | 0.23 | 0.05 | 0.41 |
Stroke | -0.12 | -0.39 | 0.15 |
Depression | -0.26 | -0.48 | -0.05 |
Arthritis | 0.08 | -0.07 | 0.23 |
Diabetes mellitus | -0.02 | -0.25 | 0.21 |
Peptic ulcer disease** | 0.04 | -0.20 | 0.28 |
Coronary revascularization during index admission | 0.12 | -0.06 | 0.30 |
Cardiogenic shock | 0.04 | -0.81 | 0.89 |
Hypotensive episode | 0.05 | -0.29 | 0.38 |
Do not resuscitate order** | -0.68 | -1.09 | -0.27 |
Positive stress test | -0.01 | -0.25 | 0.24 |
Admitted to Tertiary VA | -0.09 | -0.28 | 0.10 |
ST segment elevation MI on ECG | -0.04 | -0.29 | 0.22 |
Mean serum creatinine | 0.01 | -0.06 | 0.07 |
Left bundle branch block on ECG | -0.02 | -0.41 | 0.38 |
Cardiac catheterization during index admission | 0.04 | -0.10 | 0.19 |
Discharge diagnosis Unstable Angina (vs. MI) | 0.06 | -0.20 | 0.32 |