Table III. Risk Scores and Factors Associated with 30-day Readmission.
| Risk Factor | Rounded OR* | Points |
|---|---|---|
| Age | ||
| 65-70 | Ref | |
| 71-75 | 1.1 | |
| 76-80 | 1.2 | 1 |
| 81-85 | 1.4 | 3 |
| 86+ | 1.6 | 5 |
| Female | ||
| Yes | 1.3 | 2 |
| BMI | ||
| ≤ 25 | 1.2 | 1 |
| > 27.5 | Ref | |
| History of heart failure | ||
| Yes | 1.3 | 2 |
| Previous valvular surgery | ||
| Yes | 1.2 | 1 |
| Peripheral vascular disease | ||
| Yes | 1.2 | 1 |
| Chronic lung disease | ||
| Yes | 1.5 | 4 |
| Diabetes | ||
| None | Ref | |
| Insulin diabetes | 1.4 | 3 |
| GFR | ||
| GFR < 30 | 1.7 | 6 |
| 30 ≤ GFR < 60 | 1.2 | 1 |
| 60 ≤ GFR < 90 | Ref | |
| Renal failure - dialysis | ||
| Yes | 1.6 | 5 |
| Current heart failure | ||
| Yes | 1.3 | 2 |
| Symptoms on admission | ||
| No MI | Ref | |
| MI after 24 hrs | 1.2 | 1 |
| EF percentage | ||
| Not measured | 1.2 | 1 |
| EF < 30 | 1.5 | 4 |
| 30 ≤ EF < 45 | 1.2 | 1 |
| 45 ≤ EF | Ref | |
| PCI status | ||
| Elective | Ref | |
| Urgent | 1.4 | 3 |
| Emergency | 1.5 | 4 |
| Salvage | 1.6 | 5 |
*
p<0.001 for all variables with the exception of PCI Salvage (p=0.002). Abbreviations: BMI, body mass index; MI, myocardial infarction; GFR, glomular filtration rate; PCI, percutaneous coronary intervention; EF, ejection fraction.