Multivariate logistic regression analysis of COVID-19 risk factors
| Risk factor | Model 1 OR (95% CI) P value | Model 2 OR (95% CI) P value | Model 3 OR (95% CI) P value |
| Age (decade) | 1.78 (1.53 to 2.11)<0.001 | 1.89 (1.46 to 2.52)<0.001 | 1.89 (1.46 to 2.52)<0.001 |
| CRP (5 mg/L) | 1.04 (1.02 to 1.07)<0.001 | 1.04 (1.02 to 1.07)<0.001 | |
| Respiratory rate (breaths per minute) | 1.05 (1.01 to 1.10) 0.019 | 1.05 (1.01 to 1.10) 0.013 | |
| DBP (5 mmHg) | 0.87 (0.79 to 0.97) 0.012 | 0.87 (0.77 to 0.97) 0.015 | |
| Dementia | 4.61 (1.81 to 12.48) 0.002 | ||
| Asthma | 3.22 (1.16 to 8.92) 0.023 | ||
| AIC | 473.83 | 248.84 | 224.65 |
| Sensitivity/specificity | 0.84/0.51 | 0.86/0.67 | 0.70/0.86 |
| AUC (95% CI) | 0.72 (0.68 to 0.77) | 0.83 (0.78 to 0.88) | 0.86 (0.81 to 0.91) |
AIC, Akaike information criterion; AUC, area under the curve; CRP, C reactive protein; ; DBP, diastolic blood pressure.