Table 4.
Multivariable conditional logistic regression model for risk factors associated with severe COVID-19 on admission
| Model 1 | Model 2 | Model 3 | ||||
|---|---|---|---|---|---|---|
| Variables | Odds ratio 95% CI |
P value | Odds ratio 95% CI |
P value | Odds ratio 95% CI |
P value |
| CRP, mg/l (>34.8 vs. <34.8) | 1.798 (0.975–3.316) | 0.060 | 2.034 (1.074–3.850) | 0.029 | 2.037 (1.078–3.847) | 0.028 |
| SpO2, % (<95.5 vs. >95.5) | 1.630 (0.933–2.849) | 0.086 | 1.622 (0.933–2.821) | 0.087 | 1.639 (0.943–2.850) | 0.080 |
| Lymphocyte, × 109/l (<0.97 vs. >0.97) | 1.521 (0.847–2.731) | 0.160 | 1.555 (0.876–2.761) | 0.131 | 1.530 (0.850–2.723) | 0.148 |
| Sex (male vs. >female) | – | – | 0.726 (0.417–1.266) | 0.259 | 0.713 (0.406–1.250) | 0.237 |
| Age (year) | – | – | – | – | 0.990 (0.946–1.035) | 0.649 |
Model 1 represents unadjusted CRP, SpO2 and lymphocyte model. Model 2 includes CRP, SpO2 and lymphocyte with an additional covariate of sex. Model 3 includes CRP, SpO2 and lymphocyte with additional covariates of sex and age. CRP, C-reactive protein; SpO2, peripheral oxygen saturation. A total of 92.54% (124/134) cases with available data were included in the analysis.