Table 2. . Univariate analysis of predictors of positive RT-PCR test for SARS-CoV-2.
| Variable | Analyzed as | OR (95% CI) | p-value |
|---|---|---|---|
| Male gender | Male vs female | 1.07(0.40–2.83) | 0.896 |
| Cough | Presence vs absence | 2.22 (0.89–5.74) | 0.093 |
| Dyspnea | Presence vs absence | 0.87 (0.30–2.46) | 0.790 |
| Age (years) | ≥median vs <median | 1 (0.40–2.48) | 0.999 |
| LDH (IU/l) | ≥median vs <median | 2.98 (1.18–7.82) | 0.023 |
| Creatinine kinasis (IU/l) | ≥median vs <median | 1 (0.40–2.48) | 0.999 |
| C reactive protein (mg/dl) | ≥median vs <median | 4.8 (1.85–13.2) | 0.002 |
| Procalcitonin (ng/ml) | ≥median vs <median | 4.58 (1.78–12.5) | 0.002 |
| D-Dimer (ng/ml) | ≥median vs <median | 1.24 (0.50–3.09) | 0.645 |
| APACHE II score | ≥median vs <median | 1.10 (0.44–2.73) | 0.836 |
| CKD-EPI (ml/min per 1.73 m2) | ≥median vs <median | 0.37 (0.14–0.93) | 0.038 |
| Fibrinogen (mg/dl) | ≥median vs <median | 1.53 (0.62–3.85) | 0.357 |
| PT (s) | ≥median vs <median | 0.68 (0.27–1.70) | 0.408 |
| APTTs (s) | ≥median vs <median | 0.68 (0.27–1.70) | 0.408 |
| AST (IU/l) | ≥median vs <median | 3.54 (1.39–9.45) | 0.009 |
| ALT (IU/l) | ≥median vs <median | 1.44 (0.58–3.62) | 0.436 |
| White blood cell (/μl) | ≥median vs <median | 0.34 (0.13–0.85) | 0.023 |
| Neutrophils (/μl) | ≥median vs <median | 0.42 (0.16–1.05) | 0.067 |
| Lymphocytes (/μl) | ≥median vs <median | 1.47 (0.59–3.70) | 0.407 |
| Monocytes (/μl) | ≥median vs <median | 0.53 (0.20–1.33) | 0.180 |
| Platelets (×103/μl) | ≥median vs <median | 0.42 (0.16–1.05) | 0.067 |
| LUSS | ≥median vs <median | 3.23 (1.28–8.51) | 0.015 |
| Ratio of partial pressure arterial oxygen/fraction of inspired oxygen (mmHg) | ≥median vs <median | 1 (0.40–2.48) | 0.999 |
| Respiratory rate (per min) | ≥median vs <median | 1.90 (0.77–4.84) | 0.168 |
| Body temperature (C°) | ≥median vs <median | 17 (5.76–58) | <0.001 |
Data are reported as number of patients (%) or median (IQR), as appropriate. p-values are obtained using simple logistic regression analysis, dichotomizing each quantitative explanatory variable about its median value.
ALT: alanine transaminase; APACHEII: Acute Physiology and Chronic Health Evaluation II; APTT: activated partial thromboplastin time; AST: Aspartate transaminase; CKD-EPI: Chronic Kidney Disease Epidemiology Collaboration; IQR: Interquartile range; LDH: Lactate dehydrogenase; LUSS: Lung ultrasound score; OR; Odds ratio; PT: Prothrombin time.