Table 4. Multivariate Cox proportional hazards model for factors associated with mortality.
| Variables | Hazard ratio | 95% confidence interval | P value |
|---|---|---|---|
| Age | 1.04 | 1.00–1.08 | 0.05 |
| Females | 0.50 | 0.17–1.46 | 0.21 |
| Hospital | |||
| Y | 0.83 | 0.31–2.22 | 0.71 |
| Z | 0.83 | 0.35–1.99 | 0.68 |
| SES | |||
| B | 0.62 | 0.13–2.89 | 0.54 |
| C | 1.15 | 0.26–5.05 | 0.86 |
| Readmission | 1.99 | 1.09–3.61 | 0.03 |
| Asthma | 0.37 | 0.18–0.78 | 0.01 |
| DM | 2.27 | 1.20–4.30 | 0.01 |
| HT | 1.00 | 0.50–2.01 | 1.00 |
| Stroke | 0.98 | 0.38–2.49 | 0.96 |
| CHD | 1.06 | 0.49–2.29 | 0.88 |
| HF | 1.00 | 0.44–2.27 | 1.00 |
| Dyslipidemia | 1.18 | 0.57–2.43 | 0.66 |
| Obesity | 0.22 | 0.08–0.65 | 0.01 |
| DMP patients | 0.38 | 0.21–0.69 | 0.00 |
Reference category: males, hospital X, SES A; patients with: no readmission, no asthma, no DM, no HT, no stroke, no CHD, no HF, no dyslipidemia, no obesity, and control patients. Socio-economic status (SES) A, B, C represent ward class A, B and C respectively.