Table 5. Predictors for readmission.
| Factors | Univariate HR (95% CI) | p value | Multivariate* HR (95% CI) | p value | |
|---|---|---|---|---|---|
| Age | 0.99 (0.98–0.99) | <0.001 | 0.99 (0.98–0.99) | <0.001 | |
| Female | 0.97 (0.9–1.04) | 0.42 | - | - | |
| Median income ($) | |||||
| >79,000 | Reference | Reference | |||
| 59,000–78,999 | 1.06 (0.96–1.17) | 0.21 | 1.06 (0.95–1.18) | 0.24 | |
| 46,000–58,999 | 1.04 (0.94–1.16) | 0.34 | 1.05 (0.94–1.17) | 0.31 | |
| <45,999 | 1.17 (1.06–1.29) | <0.001 | 1.14 (1.03–1.26) | 0.01 | |
| Insurance | |||||
| Private | Reference | Reference | |||
| Medicare | 1.17 (1.04–1.32) | 0.008 | 1.29 (1.13–1.48) | <0.001 | |
| Medicaid | 1.62 (1.4–1.89) | <0.001 | 1.47 (1.27–1.72) | <0.001 | |
| Uninsured | 1.19 (0.88–1.62) | 0.24 | 1.11 (0.81–1.53) | 0.48 | |
| Charlson comorbidity score | 1.06 (1.04–1.06) | <0.001 | 1.06 (1.04–1.08) | <0.001 | |
| Hospital location | |||||
| Large metropolitan area | Reference | Reference | |||
| Small metropolitan area | 0.95 (0.88–1.02) | 0.18 | 0.95 (0.88–1.03) | 0.22 | |
| Micropolitan area | 0.91 (0.79–1.03) | 0.15 | 0.9 (0.77–1.05) | 0.18 | |
| Not metropolitan or micropolitan area | 0.87 (0.7–1.09) | 0.2 | 0.92 (0.73–1.18) | 0.54 | |
| Teaching hospital | 1.06 (0.99–1.14) | 0.07 | 1 (0.92–1.09) | 0.82 | |
| Hospital bed size | |||||
| Small | Reference | Reference | |||
| Medium | 1.04 (0.94–1.14) | 0.43 | 1.01 (0.91–1.11) | 0.82 | |
| Large | 1.07 (0.98–1.17) | 0.09 | 1.03 (0.94–1.13) | 0.49 | |
| Mechanical ventilation | 1.06 (0.98–1.15) | 0.11 | 0.95 (0.87–1.04) | 0.32 | |
| Cardiogenic shock | 0.96 (0.81–1.14) | 0.66 | - | - | |
| Discharge to rehabilitation | 1.37 (0.99–1.9) | 0.052 | 1.2 (0.86–1.73) | 0.25 | |
| Length of stay | 1.007 (1.003–1.01) | <0.001 | 1 (0.99–1) | 0.06 | |
HR = hazard ratio.
*Adjusted to age, median income, insurance, Charlson comorbidity score, hospital location, teaching location, hospital bed size, mechanical ventilation, discharge to rehabilitation, length of stay.