Table 4.
Multivariable Logistic Regression Analysis for In‐Hospital Mortality in AMI Admissions Receiving CABG
| AMI‐CABG Admissions (N=1 071 156) | OR | 95% CI | P Value | |
|---|---|---|---|---|
| Lower Limit | Upper Limit | |||
| Age groups, y | ||||
| 19–49 | Reference category | |||
| 50–59 | 1.23 | 1.16 | 1.31 | <0.001 |
| 60–69 | 1.56 | 1.46 | 1.66 | <0.001 |
| 70–79 | 2.27 | 2.12 | 2.44 | <0.001 |
| ≥80 | 3.22 | 3.00 | 3.46 | <0.001 |
| Women | 1.50 | 1.46 | 1.53 | <0.001 |
| Race/ethnicity | ||||
| White | Reference category | |||
| Black | 1.04 | 0.99 | 1.10 | 0.08 |
| Other* | 1.03 | 1.01 | 1.06 | 0.01 |
| Primary payer | ||||
| Medicare | Reference category | |||
| Medicaid | 0.93 | 0.88 | 0.98 | 0.01 |
| Private | 0.76 | 0.74 | 0.79 | <0.001 |
| Other† | 0.97 | 0.93 | 1.02 | 0.31 |
| Quartile of median household income for zip code | ||||
| 0–25th | Reference category | |||
| 26th–50th | 0.97 | 0.94 | 1.00 | 0.03 |
| 51st–75th | 0.90 | 0.87 | 0.93 | 0.000 |
| 75th–100th | 0.90 | 0.87 | 0.93 | 0.000 |
| Study period | ||||
| 2000–2005 | Reference category | |||
| 2006–2011 | 0.44 | 0.43 | 0.45 | <0.001 |
| 2012–2017 | 0.23 | 0.22 | 0.24 | <0.001 |
| Weekend admissions | 0.97 | 0.94 | 0.99 | 0.02 |
| Charlson Comorbidity Index | ||||
| 0–3 | Reference category | |||
| 4–6 | 1.32 | 1.28 | 1.37 | <0.001 |
| ≥ 7 | 1.40 | 1.33 | 1.46 | <0.001 |
| Hospital teaching status and location | ||||
| Rural | Reference category | |||
| Urban nonteaching | 0.99 | 0.93 | 1.05 | 0.70 |
| Urban teaching | 1.00 | 0.94 | 1.06 | 0.96 |
| Hospital bed size | ||||
| Small | Reference category | |||
| Medium | 0.92 | 0.88 | 0.97 | 0.001 |
| Large | 0.85 | 0.81 | 0.89 | <0.001 |
| Hospital region | ||||
| Northeast | Reference category | |||
| Midwest | 1.04 | 1.00 | 1.08 | 0.030 |
| South | 1.21 | 1.17 | 1.25 | <0.001 |
| West | 0.90 | 0.87 | 0.94 | <0.001 |
| AMI type | ||||
| STEMI | Reference category | |||
| NSTEMI | 0.92 | 0.90 | 0.94 | <0.001 |
| Cardiac arrest | 5.98 | 5.82 | 6.15 | <0.001 |
| Cardiogenic shock | 2.32 | 2.26 | 2.39 | <0.001 |
| Acute organ dysfunction | ||||
| Respiratory | 1.47 | 1.43 | 1.51 | <0.001 |
| Renal | 2.93 | 2.86 | 3.01 | <0.001 |
| Hepatic | 3.25 | 3.10 | 3.40 | <0.001 |
| Hematologic | 1.26 | 1.23 | 1.30 | <0.001 |
| Neurological | 1.02 | 0.98 | 1.06 | 0.35 |
| Coronary angiography | 0.76 | 0.74 | 0.78 | <0.001 |
| Percutaneous coronary intervention | 0.96 | 0.93 | 0.99 | 0.01 |
| Pulmonary artery catheterization | 0.92 | 0.88 | 0.96 | <0.001 |
| Mechanical circulatory support | 2.65 | 2.59 | 2.72 | <0.001 |
| Invasive mechanical ventilation | 1.76 | 1.71 | 1.81 | <0.001 |
| Noninvasive mechanical ventilation | 0.59 | 0.54 | 0.64 | <0.001 |
| Hemodialysis | 1.95 | 1.85 | 2.05 | <0.001 |
| Palliative care referral | 28.17 | 25.38 | 31.26 | <0.001 |
| Do‐not‐resuscitate status | 10.77 | 9.87 | 11.76 | <0.001 |
AMI indicates acute myocardial infarction; CABG, coronary artery bypass grafting; NSTEMI, non–ST‐segment–elevation myocardial infarction; OR, odds ratio; and STEMI, ST‐segment–elevation myocardial infarction.
*
Hispanic, Asian, Native American, other.
†
Uninsured, no charge, other.