Table 2.
Cox regression model showing variables associated with 28-day mortality
| Variables | Hazard ratio | Standard error | P value | Lower limit (95 % CI) | Upper limit (95 % CI) |
|---|---|---|---|---|---|
| Calcium supplementation | 0.509913 | 0.023411 | <0.001 | 0.466033 | 0.557925 |
| Sex | 0.838076 | 0.038628 | <0.001 | 0.765685 | 0.917312 |
| Age | 1.020377 | 0.001796 | <0.001 | 1.016864 | 1.023903 |
| SAPSI-1 score | 1.093642 | 0.006636 | <0.001 | 1.080713 | 1.106726 |
| Sofa score | 1.074119 | 0.008373 | <0.001 | 1.057834 | 1.090655 |
| Ca2+ on ICU entry | 0.201529 | 0.040239 | <0.001 | 0.136263 | 0.298054 |
| Asian population | 1.130669 | 0.124779 | 0.266 | 0.910748 | 1.403695 |
| Congestive heart failure | 1.266334 | 0.064469 | <0.001 | 1.146076 | 1.399211 |
| Hypertension | 1.041436 | 0.052815 | 0.423 | 0.942899 | 1.150271 |
| Chronic pulmonary disease | 1.081551 | 0.062353 | 0.174 | 0.965993 | 1.210932 |
| Renal failure | 0.7697 | 0.074854 | 0.007 | 0.636123 | 0.931326 |
| Liver disease | 1.600751 | 0.138914 | <0.001 | 1.350381 | 1.897541 |
| Alcohol abuse | 1.258592 | 0.140858 | 0.04 | 1.010697 | 1.56729 |
| Serum creatinine on ICU entry | 1.114954 | 0.016701 | <0.001 | 1.082696 | 1.148173 |