Table 5.
Predictors of Time to First Readmission More Than 60 Days After Index Admission for Patients Alive 60 Days After Index Admission (Multivariable)
| Any Readmission | Cardiovascular Readmission | |||||
|---|---|---|---|---|---|---|
| Hazard Ratio | 95% CI | P Value | Hazard Ratio | 95% CI | P Value | |
| Age | 1.009 | 1.008 to 1.010 | .0001 | 1.007 | 1.006 to 1.008 | .0001 |
| Gender (male versus female) | 1.299 | 1.172 to 1.439 | .0001 | 1.296 | 1.146 to 1.467 | .0001 |
| Race (white versus others) | 0.921 | 0.894 to 0.948 | .0001 | 0.885 | 0.856 to 0.916 | .0001 |
| Hypertension | 0.973 | 0.952 to 0.995 | .0153 | 1.036 | 1.009 to 1.063 | .0078 |
| Diabetes | 1.076 | 1.048 to 1.104 | .0001 | 1.102 | 1.068 to 1.136 | .0001 |
| Congestive heart failure | 1.144 | 1.111 to 1.179 | .0001 | 1.343 | 1.298 to 1.389 | .0001 |
| Hyperlipidemia | 0.814 | 0.789 to 0.840 | .0001 | 0.887 | 0.855 to 0.919 | .0001 |
| Atrial fibrillation | 1.016 | 0.977 to 1.056 | .4322 | 1.077 | 1.029 to 1.126 | .0013 |
| COPD | 1.136 | 1.104 to 1.169 | .0001 | 1.042 | 1.007 to 1.078 | .0184 |
| Stroke | 0.895 | 0.789 to 1.014 | .0824 | 0.930 | 0.800 to 1.080 | .3422 |
| Discharge diagnoses, n | 1.065 | 1.060 to 1.071 | .0001 | 1.061 | 1.055 to 1.067 | .0001 |
| Charlson Index | 1.112 | 1.080 to 1.144 | .0001 | 1.018 | 0.984 to 1.053 | .3003 |
| Cardiac catheterization at index | 2.032 | 1.979 to 2.085 | .0001 | 2.856 | 2.772 to 2.942 | .0001 |
| CABG or PTCA at index | 1.283 | 1.243 to 1.325 | .0001 | 1.475 | 1.426 to 1.527 | .0001 |
| CABG or PTCA within 60 days | 0.695 | 0.663 to 0.728 | .0001 | 0.544 | 0.516 to 0.574 | .0001 |
| Clinic visits within 60 days* | ||||||
| Cardiology and General Medicine versus none | 0.977 | 0.928 to 1.028 | .3727 | 1.081 | 1.019 to 1.147 | .0100 |
| Cardiology versus none | 0.937 | 0.906 to 0.969 | .0001 | 1.047 | 1.008 to 1.088 | .0189 |
| General Medicine versus none | 0.987 | 0.959 to 1.016 | .3691 | 1.033 | 0.998 to 1.068 | .0619 |
| Region | ||||||
| MW versus S | 0.975 | 0.949 to 1.002 | .0704 | 0.931 | 0.902 to 0.962 | .0001 |
| NE versus S | 0.951 | 0.921 to 0.983 | .0029 | 0.882 | 0.849 to 0.917 | .0001 |
| W versus S | 0.952 | 0.924 to 0.980 | .0010 | 0.924 | 0.893 to 0.957 | .0001 |
*
Interaction between Cardiology and General Medicine not significant; P = .0937 and .9968.
COPD, chronic obstructive pulmonary disease; CABG, coronary artery bypass grafting; PTCA, percutaneous transluminal coronary angioplasty; MW, Midwest; NE, Northeast; S, South; W, West.