Table II. Independent Risk Factors for 30-day Readmission.
| Risk Factor | OR | 95% CI | P-value | Wald P-value |
|---|---|---|---|---|
| Intercept | 0.04 | [0.03, 0.04] | <0.001 | |
| Age | <0.001 | |||
| 65-70 | Ref | |||
| 71-75 | 1.10 | [1.06, 1.15] | <0.001 | |
| 76-80 | 1.23 | [1.18, 1.29] | <0.001 | |
| 81-85 | 1.45 | [1.38, 1.51] | <0.001 | |
| 86+ | 1.59 | [1.51, 1.69] | <0.001 | |
| Female | ||||
| No | Ref | |||
| Yes | 1.27 | [1.23, 1.30] | <0.001 | |
| BMI | <0.001 | |||
| ≤ 25 | 1.21 | [1.17, 1.26] | <0.001 | |
| ≤ 27.5 | 1.06 | [1.02, 1.10] | 0.004 | |
| > 27.5 | Ref | |||
| History of heart failure | ||||
| No | Ref | |||
| Yes | 1.33 | [1.27, 1.38] | <0.001 | |
| Previous valvular surgery | ||||
| No | Ref | |||
| Yes | 1.19 | [1.08, 1.31] | <0.001 | |
| Cerebrovascular disease | ||||
| No | Ref | |||
| Yes | 1.14 | [1.10, 1.18] | <0.001 | |
| Peripheral vascular disease | ||||
| No | Ref | |||
| Yes | 1.23 | [1.18, 1.27] | <0.001 | |
| Chronic lung disease | ||||
| No | Ref | |||
| Yes | 1.50 | [1.45, 1.55] | <0.001 | |
| Diabetes | <0.001 | |||
| None | Ref | |||
| Non-insulin diabetes | 1.10 | [1.06, 1.14] | <0.001 | |
| Insulin diabetes | 1.40 | [1.34, 1.46] | <0.001 | |
| GFR | <0.001 | |||
| Not measured | 1.00 | [0.93, 1.08] | 0.974 | |
| GFR < 30 | 1.75 | [1.63, 1.88] | <0.001 | |
| 30 ≤ GFR <60 | 1.20 | [1.17, 1.25] | <0.001 | |
| 60 ≤ GFR <90 | Ref | |||
| 90 ≤ GFR | 1.08 | [1.02, 1.14] | 0.006 | |
| Renal failure - dialysis | ||||
| No | Ref | |||
| Yes | 1.56 | [1.42, 1.71] | <0.001 | |
| Hypertension | ||||
| No | Ref | |||
| Yes | 1.11 | [1.07, 1.16] | <0.001 | |
| History of tobacco use | ||||
| No | Ref | |||
| Yes | 1.04 | [0.99, 1.09] | 0.09 | |
| Previous PCI | ||||
| No | Ref | |||
| Yes | 0.91 | [0.88, 0.94] | <0.001 | |
| Current heart failure | ||||
| No | Ref | |||
| Yes | 1.33 | [1.28, 1.39] | <0.001 | |
| Symptoms on admission | <0.001 | |||
| No MI | Ref | |||
| MI within 24 hrs | 1.08 | [1.04, 1.13] | <0.001 | |
| MI after 24 hrs | 1.16 | [1.10, 1.23] | <0.001 | |
| EF percentage | <0.001 | |||
| Not measured | 1.18 | [1.14, 1.22] | <0.001 | |
| EF < 30 | 1.53 | [1.43, 1.63] | <0.001 | |
| 30 ≤ EF<45 | 1.23 | [1.17, 1.28] | <0.001 | |
| 45 ≤ EF | Ref | |||
| PCI status | <0.001 | |||
| Elective | Ref | |||
| Urgent | 1.39 | [1.35, 1.44] | <0.001 | |
| Emergency | 1.53 | [1.44, 1.62] | <0.001 | |
| Salvage | 1.64 | [1.21, 2.23] | 0.002 | |
| Highest risk lesion | <0.001 | |||
| Unknown | Ref | |||
| pRCA/mLAD/pCIRC | 1.07 | [1.04, 1.11] | <0.001 | |
| pLAD | 1.09 | [1.04, 1.13] | <0.001 | |
| Left Main | 1.08 | [0.99, 1.18] | 0.07 | |
| Max prePCI TIMI flow: none | ||||
| No | Ref | |||
| Yes | 1.09 | [1.03, 1.15] | 0.001 |
Abbreviations: BMI, body mass index; EF, ejection fraction; GFR, glomular filtration rate; MI, myocardial infarction; PCI, percutaneous coronary intervention.