Table 4. Multivariate analysis of COVID-19 severity.

Variables	β	SE	OR(95%CI)	P
Age≥63 years old	3.714	1.362	41.036(2.843~592.356)	0.006
Absolute lymphocyte value≤1.02×10^9/L	1.806	0.725	6.089(1.469~25.230)	0.013
C-reactive protein≥65.08mg/L	2.183	1.084	8.876(1.016~74.228)	0.044

^aSE, standard error; OR, odds ratio; CI, confidence interval. Variables were categorized by threshold values, whereas functions were inferred by ranges, not formulas. The effect in this multivariate regression was that the variables were independent from each other.