Table 2.
Features selection (univariate and multivariate analyses).
| Variable | Univariate analysis | Multivariate analysis | |||
|---|---|---|---|---|---|
| HR (95% CI) | P | HR (95% CI) | P | ||
| Insurance | Medicare (ref) | ||||
| Private | 0.59 (0.48-0.73) | <0.0001 | 0.57 (0.46-0.70) | <0.0001 | |
| Other | 0.49 (0.36-0.68) | <0.0001 | 0.44 (0.32-0.61) | <0.0001 | |
| Married (no) | 1.18 (1.01-1.37) | 0.0373 | |||
| Ethnicity | White (ref) | ||||
| Black | 0.75 (0.60-0.93) | 0.0080 | |||
| Other | 0.85 (0.63-1.14) | 0.2740 | |||
| Gender (female) | 0.87 (0.74-1.02) | 0.0775 | |||
| WBC (K/μL) | 1.01 (1.00-1.02) | 0.1420 | |||
| Creatinine | 1.01 (0.98-1.03) | 0.6770 | |||
| PCO2 | 1.00 (1.00-1.01) | 0.7550 | |||
| PH | 0.89 (0.45-1.74) | 0.7230 | |||
| PO2 | 1.00 (1.00-1.00) | 0.1680 | |||
| Albumin (g/dL) | 0.79 (0.70-0.89) | <0.0001 | 0.86 (0.76-0.98) | 0.0252 | |
| Alkaline phosphatase (IU/L) | 1.00 (1.00-1.00) | 0.0003 | 1.00 (1.00-1.00) | 0.0059 | |
| Anion gap (mEq/L) | 1.00 (0.98-1.01) | 0.7790 | |||
| Bicarbonate (mEq/L) | 0.99 (0.98-1.01) | 0.2760 | |||
| Bilirubin Total (mg/dL) | 1.01 (0.98-1.04) | 0.4780 | |||
| CK (IU/L) | 1.00 (1.00-1.00) | 0.1500 | |||
| Glucose (mg/dL) | 1.00 (1.00-1.00) | 0.2580 | |||
| LD (IU/L) | 1.00 (1.00-1.00) | 0.4240 | |||
| Magnesium (mg/dL) | 1.14 (0.96-1.36) | 0.1330 | |||
| MCH (pg) | 1.01 (0.99-1.04) | 0.3020 | |||
| MCHC | 0.92 (0.87-0.96) | 0.0002 | 0.95 (0.9-1.00) | 0.0471 | |
| MCV (f/L) | 1.02 (1.01-1.03) | 0.0008 | 1.02 (1.01-1.03) | 0.0010 | |
| Monocytes | 1.00 (0.97-1.02) | 0.8530 | |||
| Neutrophils | 1.01 (1.00-1.01) | 0.0100 | |||
| Platelet count (K/μL) | 1.00 (1.00-1.00) | 0.3570 | |||
| PT | 1.01 (1.00-1.02) | 0.0100 | |||
| RBC (m/μL) | 0.83 (0.75-0.92) | 0.0002 | |||
| Coronary angiogram (yes) | 0.69 (0.55-0.86) | 0.0008 | 0.79 (0.63-0.99) | 0.0406 | |
| Acute renal failure (yes) | 1.31 (1.12-1.54) | 0.0006 | 1.26 (1.07-1.48) | 0.0058 | |
| Infection (yes) | 1.19 (0.98-1.44) | 0.0760 | |||
| Blood (urine) | Negative (ref) | ||||
| Small | 1.13 (0.87-1.47) | 0.3480 | |||
| Moderate | 1.29 (1.00-1.65) | 0.0510 | |||
| Large | 1.11 (0.93-1.33) | 0.2350 | |||
| Negative (ref) | |||||
| Bilirubin | Small | 1.27 (0.99-1.62) | 0.0574 | ||
| Moderate | 1.61 (0.80-3.24) | 0.1820 | |||
| Large | 1.16 (0.60-2.25) | 0.6550 | |||
| Kidney surgery (yes) | 0.37 (0.32-0.43) | <0.0001 | 0.40 (0.34-0.47) | <0.0001 | |
| Diabetes (yes) | 0.88 (0.76-1.03) | 0.1170 | |||
| Hyperlipemia (yes) | 0.58 (0.50-0.68) | <0.0001 | 0.74 (0.63-0.87) | 0.0003 | |
| Dilantin (yes) | 1.35 (0.99-1.85) | 0.0600 | |||
| Digoxin (yes) | 1.79 (1.40-2.29) | <0.0001 | 1.32 (1.03-1.69) | 0.0029 | |
| Vancomycin (yes) | 1.66 (1.42-1.94) | <0.0001 | |||
| Tylenol (yes) | 0.81 (0.57-1.14) | 0.2190 | |||