Table 2.
Data analysis using the crude and adjusted Cox regression models considering mortality as a single outcome.
| Variable | Level variable | Death (n = 73, 12.5%) | Crude model | Adjusted model | ||
|---|---|---|---|---|---|---|
| HR (95% CI) | p | HR (95% CI) | p | |||
| Age (mean ± S.D) | 75.8 ± 14.9 | 1.04 (1.02, 1.06) | 0.001 | 1.02 (1.01, 1.05) | 0.034 | |
| Sex | Female (n, %) | 29(10.5) | Baseline | 0.095 | – | – |
| Male (n, %) | 44 (14.4) | 1.49 (0.93, 2.38) | – | |||
| ICU | ICU | 40 (51.9) | Baseline | 0.001 | Baseline | 0.117 |
| 3.69 (2.18, 6.25) | 1.89 (0.85, 4.20) | |||||
| Atorvastatin | Yes (n, %) | 17 (10.4) | Baseline | 0.040 | Baseline | 0.114 |
| 0.56 (0.32, 0.97) | 0.51 (0.22, 1.17) | |||||
| Sign and symptoms | ||||||
| Fever | Yes (n, %) | 25 (8.6) | Baseline | 0.001 | Baseline | 0.467 |
| 0.44 (0.27, 0.72) | 1.30 (0.64, 2.63) | |||||
| Cough | Yes (n, %) | 22 (10.3) | Baseline | 0.027 | Baseline | 0.711 |
| 0.56 (0.34, 0.93) | 0.87 (0.43, 1.76) | |||||
| ARDS | Yes (n, %) | 34 (16.7) | Baseline | 0.367 | – | – |
| 1.23 (0.77, 1.96) | – | |||||
| Consciousness | Yes (n, %) | 10 (30.3) | Baseline | 0.103 | – | – |
| 1.75 (0.89, 3.43) | – | |||||
| Comorbidities | ||||||
| Diabetes | Yes (n, %) | 15 (18.5) | Baseline | 0.133 | – | – |
| 1.54 (0.87, 2.73) | – | |||||
| Cardiovascular diseases | Yes (n, %) | 26 (17.8) | Baseline | 0.011 | Baseline | 0y.023 |
| 1.86 (1.15, 3.01) | 2.37 (1.13, 4.99) | |||||
| Asthma | Yes (n, %) | 12 (22.6) | Baseline | 0.109 | – | – |
| 1.66 (0.89, 3.09) | – | |||||
| Hypertension | Yes (n, %) | 22 (14.1) | Baseline | 0.793 | – | – |
| 1.06 (0.54, 1.76) | – | |||||
| Oxygen therapy status | Yes (n, %) | 35 (29.9) | Baseline | 0.001 | Baseline | 0.776 |
| 2.89 (1.59, 5.24) | 1.11 (0.53, 2.32) | |||||
| Other | ||||||
| Intubation | Yes (n, %) | 22 (91.6) | Baseline | 0.001 | Baseline | 0.056 |
| 5.25 (2.95, 9.34) | 2.16 (0.98, 4.80) | |||||
| pO2 | <93% | 55 (19.2) | Baseline | 0.002 | Baseline | 0.255 |
| >93% | 16 (5.7) | 0.41 (0.23, 0.73) | 0.58 (0.22, 1.49) | |||
| Number of breaths | 14–18 | 4 (11.4) | Baseline | 0.434 | – | – |
| 18–22 | 13 (10.6) | 0.63 (0.20, 1.97) | – | |||
| >22 | 12 (42.8) | 1.92 (0.60, 6.10) | 0.266 | – | – | |
| CT scan | Yes (n, %) | 22 (13.7) | Baseline | 0.874 | – | - – |
| 0.95 (0.54, 1.68) | – | |||||
| Opium use | Yes (n, %) | 8 (19.5) | Baseline | 0.080 | – | – |
| 1.93 (0.92, 4.04) | – | |||||
| SPO2 (mean ± S.D) | 85.4 ± 10.2 | 0.94 (0.92, 0.96) | 0.001 | 0.96 (0.92, 0.99) | 0.035 | |
| Body temperature (mean ± S.D) | 36.8 ± 0.6 | 0.69 (0.47, 1.01) | 0.060 | – | – | |
| The time from the onset of symptoms to hospitalization (mean ± S.D) | 4.4 ± 2.3 | 0.94 (0.84, 1.04) | 0.253 | – | – | |
| Laboratory measures | ||||||
| WBC (mean ± S.D) | 9.8 ± 4.3 | 1.02 (1.01, 1.04) | 0.012 | 1.04 (0.93, 1.16) | 0.459 | |
| HB (mean ± S.D) | 12.2 ± 1.8 | 0.90 (0.79, 1.03) | 0.145 | – | – | |
| PLT (mean ± S.D) | 194.3 ± 87.9 | 0.99 (0.99, 1.00) | 0.399 | – | – | |
| Neut (mean ± S.D) | 78.0 ± 14.9 | 1.01 (0.99, 1.03) | 0.191 | – | – | |
| Lymph (mean ± S.D) | 15.3 ± 11.8 | 0.97 (0.95, 1.00) | 0.056 | – | – | |
| RDW (mean ± S.D) | 15.0 ± 2.2 | 1.17 (1.06, 1.29) | 0.001 | 0.91 (0.76, 1.09) | 0.318 | |
| MPV (mean ± S.D) | 10.0 ± 1.0 | 0.99 (0.79, 1.24) | 0.941 | – | – | |
| BUN (mean ± S.D) | 23.8 ± 16.7 | 1.02 (1.01, 1.04) | 0.001 | 1.01 (0.92, 1.04) | 0.198 | |
| Cr (mean ± S.D) | 1.5 ± 1.8 | 1.13 (1.01, 1.26) | 0.025 | 1.18 (1.01, 1.39) | 0.044 | |
| CRP (mean ± S.D) | 1.1 ± 0.6 | 1.03 (0.75, 1.41) | 0.835 | – | – | |
P < 0.05 was considered significant.