Table 2.
Univariate and Sex-Adjusted Cox Regressions to Predict Survival Time
| n | Model 1: Univariate |
Model 2: Adjusted for Sex |
|||||
|---|---|---|---|---|---|---|---|
| HR (95% CI) | P value | R2 % | HR (95% CI) | P value | R2 % | ||
| Male sex | 235 | 2.65 (1.66-4.24) | <.001 | 12.8 | — | — | — |
| No. of medications | 230 | 1.45 (1.01-2.09) | .045 | 3.6 | 1.32 (0.92-1.88) | .13 | 3.6 |
| Peripheral artery disease | 235 | 2.08 (1.18-3.66) | .011 | 3.6 | 1.72 (0.97-3.05) | .06 | 3.6 |
| Heart failure | 235 | 1.54 (0.96-2.45) | .07 | 1.7 | 1.51 (0.95-2.40) | .09 | 1.7 |
| Cough | 235 | 1.18 (0.74-1.88) | .50 | 0.4 | 1.13 (0.71-1.81) | .61 | 0.4 |
| Headache | 234 | 0.13 (0.02-0.95) | .044 | 6.0 | 0.15 (0.02-1.09) | .06 | 6.0 |
| Anorexia | 233 | 0.49 (0.24-0.98) | .044 | 3.0 | 0.47 (0.23-0.94) | .034 | 3.0 |
| Dyspnea | 235 | 1.51 (0.96-2.37) | .08 | 1.6 | 1.63 (1.03-2.56) | .036 | 1.6 |
| Crackles | 235 | 2.93 (1.58-5.42) | .001 | 5.3 | 2.54 (1.36-4.73) | .003 | 10.6 |
| Cardiac failure signs | 233 | 1.78 (1.07-2.95) | .027 | 2.7 | 1.77 (1.07-2.94) | .03 | 2.8 |
| Asthenia | 235 | 1.43 (0.90-2.27) | .13 | 1.1 | 1.40 (0.88-2.22) | .15 | 1.0 |
| CURB-65 | 235 | 1.24 (0.96-1.62) | .11 | 1.2 | 1.18 (0.90-1.55) | .22 | 1.2 |
| CAM18 | 220 | 2.09 (1.18-3.70) | .011 | 3.9 | 2.11 (1.19-3.74) | .011 | 3.9 |
| Frailty | 235 | 1.44 (1.23-1.69) | <.001 | 16.5 | 1.46 (1.24-1.70) | <.001 | 16.5 |
| Frailty ≥5 | 235 | 4.65 (1.70-12.72) | .003 | 1.0 | 4.39 (1.60-12.02) | .004 | 10.5 |
| FIM20 | 183 | 0.98 (0.97-0.99) | <.001 | 18.5 | 0.98 (0.97-0.99) | .001 | 18.5 |
| CIRS-G19 | 235 | 1.06 (1.03-1.10) | .001 | 8.0 | 1.05 (1.01-1.09) | .007 | 8.0 |
| FiO2 | 235 | 1.05 (1.03-1.07) | <.001 | 18.8 | 1.05 (1.04-1.07) | <.001 | 18.8 |
| O2 nasal cannula | 235 | 1.79 (1.07-3.00) | .026 | 12.6 | 1.82 (1.09-3.04) | .020 | 12.6 |
| O2 mask | 235 | 4.72 (2.39-9.32) | <.001 | — | 4.48 (2.27-8.85) | <.001 | — |
| Heart rate | 235 | 1.02 (1.00-1.03) | .009 | 4.6 | 1.02 (1.00-1.03) | .005 | 4.6 |
| Respiratory rate | 235 | 1.03 (1.01-1.04) | .008 | 4.7 | 1.03 (1.01-1.05) | <.001 | 4.7 |
| Lymphocytes <1.0 × 109/L | 225 | 2.08 (1.23-3.52) | .006 | 6.1 | 1.79 (1.05-3.05) | .031 | 18.4 |
| C-reactive protein, mg/L | 229 | 1.01 (1.00-1.01) | <.001 | 14.3 | 1.01 (1.00-1.01) | <.001 | 14.3 |
| Creatinine, μmol/L | 231 | 1.0026 (1.0008-1.0045) | .005 | 3.8 | 1.0015 (0.9994-1.0036) | .16 | 3.8 |
| eGFR, mL/min/1.73m2 | 231 | 0.9883 (0.9778-0.9990) | .036 | 2.8 | 0.9914 (0.9811-1.0017) | .10 | 2.8 |
| Albumin, g/dL | 156 | 0.93 (0.89-0.97) | .002 | 11.9 | 0.94 (0.90-0.98) | .009 | 11.9 |
| Pulmonary infiltrate | 225 | 2.12 (1.26-3.54) | .004 | 6.6 | 1.86 (1.11-3.13) | .020 | 6.5 |
| Bilateral | 225 | 2.50 (1.57-3.97) | <.001 | 11.1 | 2.26 (1.42-3.60) | .001 | 11.2 |
| Peripheral | 225 | 2.26 (1.39-3.65) | .001 | 8.7 | 2.04 (1.26-3.32) | .004 | 8.7 |
R2, coefficient of determination.