Table 2.
Univariate conditional logistic regression analysis.
| β (e.e.) | OR (95% CI) | p | |
|---|---|---|---|
| Sex (men vs. women) | 0.35 (0.14) | 2.016 (1.153–3.526) | .0139 |
| Prior follow-up | |||
| Consultation in the last month for symptoms (no vs. yes) | 0.35 (0.18) | 2.026 (1.001–4.101) | .0497 |
| Contact with primary care (no vs. yes) | 0.31 (0.13) | 1.858 (1.122–3.078) | .0161 |
| Time between onset of symptoms and first contacta | −0.029 (0.032) | 0.972 (0.913–1.035) | .3731 |
| Symptoms | |||
| Syncope (yes vs. no) | −0.96 (0.54) | 0.147 (0.018–1.214) | .0750 |
| Dry cough (no vs. yes) | 0.30 (0.13) | 1.829 (1.095–3.054) | .0210 |
| Asthenia (yes vs. no) | −0.22 (0.17) | 0.639 (0.322–1.266) | .1989 |
| Sore throat (no vs. yes) | 0.79 (0.27) | 4.43 (1.709–14.295) | .0032 |
| Dyspnea (yes vs. no) | 0.19 (0.13) | 1.454 (0.874–2.418) | .1495 |
| Pathological X-ray (yes vs. no) | 0.65 (0.23) | 3.692 (1.514–9.001) | .0041 |
| Baseline P/F ratio | |||
| 101–200 vs. >300 | −0.46 (0.46) | 0.250 (0.023–2.757) | .3113 |
| 201−300 vs. >300 | −0.46 (0.58) | 0.250 (0.017–3.660) | .4235 |
| Tachypnea in the emergency department (yes vs. no) | 0.36 (0.16) | 2.041 (1.096–3.799) | .0245 |
| O2 saturation in the emergency department (≤90 vs.>90) | 0.92 (0.23) | 6.291 (2.517–15.722) | <.0001 |
| Comorbidities | |||
| AMI (yes vs. no) | 0.78 (0.26) | 4.785 (1.699–13.477) | .0030 |
| Peripheral vascular disease (yes vs. no) | 0.37 (0.22) | 2.115 (0.907–4.929) | .0828 |
| Dementia (yes vs. no) | −0.10 (0.38) | 0.826 (0.185–3.697) | .8028 |
| COPD (yes vs. no) | 0.21 (0.14) | 1.526 (0.880–2.646) | .1327 |
| Mild liver disease (yes vs. no) | 0.36 (0.20) | 2.066 (0.938–4.552) | .0718 |
| DM with organ damage (yes vs. no) | 0.77 (0.35) | 4.667 (1.207–18.046) | .0256 |
| Kidney disease (yes vs. no) | 0.31 (0.22) | 1.846 (0.768–4.436) | .1707 |
| HT (yes vs. no) | 0.28 (0.13) | 1.755 (1.054–2.923) | .0306 |
| Coagulopathy (yes vs. no) | 0.69 (0.43) | 4.000 (0.733−21.838) | .1094 |
| Gastrointestinal bleeding (yes vs. no) | 0.46 (0.34) | 2.500 (0.671−9.310) | .1720 |
| Asthma (yes vs. no) | 0.04 (0.18) | 1.086 (0.546−2.160) | .8137 |
| Baseline blood test | |||
| Creatininea | 0.300 (0.21) | 1.349 (0.901–2.018) | .1459 |
| Glucosea | 0.011 (0.003) | 1.011 (1.005–1.018) | .0009 |
| LDHa | 0.005 (0.001) | 1.005 (1.002–1.007) | .0006 |
| CRPa | 0.006 (0.002) | 1.006 (1.003–1.010) | .0008 |
| Sodiuma | −0.077 (0.038) | 0.926 (0.859–0.998) | .0444 |
| Ureaa | 0.010 (0.006) | 1.010 (0.999–1.022) | .0858 |
| Hematocrita | 0.035 (0.024) | 1.036 (0.988–1.086) | .1455 |
| Plateletsa | −0.005 (0.002) | 0.995 (0.991–0.999) | .0084 |
β (e.e.): estimation (standard error); DM: diabetes mellitus; COPD: chronic obstructive pulmonary disease; HT: hypertension; AMI: acute myocardial infarction; CI: confidence interval; LDH: lactate dehydrogenase; P/F ratio: partial pressure of O2/fraction of inspired O2; CRP: C-reactive protein; OR: odds ratio.
a
Estimation per each unit increase.