Table 3. Univariable analysis of prognostic factors for severe COVID-19.

Prognostic factors		OR (95% CI)	P value
Age, yr		1.07 (1.03–1.11)	0.001
	0–39	Reference
	40–49	0.00 (0.0–0.0)	1.000
	50–59	0.40 (0.03–4.70)	0.463
	60–69	3.46 (0.65–18.29)	0.145
	≥ 70	8.14 (1.57–42.33)	0.013
Male, sex		2.43 (0.95–6.22)	0.065
Diabetes mellitus		7.47 (2.73–20.40)	< 0.001
Hypertension		2.71 (1.06–6.93)	0.038
Body temperature, °C		2.54 (1.35–4.78)	0.004
	< 37.8	Reference
	≥ 37.8	6.36 (2.32–17.43)	< 0.001
Respiratory rate		1.42 (1.14–1.76)	< 0.001
	≤ 20	Reference
	> 20	8.11 (2.94–22.36)	< 0.001
Peripheral oxygen saturation, %		0.75 (0.66–0.85)	< 0.001
	≥ 92	Reference
	< 92	17.71 (5.82–53.87)	< 0.001
Albumin		0.03 (0.01–0.13)	< 0.001
	≥ 3.5	Reference
	< 3.5	24.82 (6.63–92.92)	< 0.001
Total bilirubin		3.19 (1.22–8.35)	0.018
	≤ 1.2	Reference
	> 1.2	2.71 (1.05–7.00)	0.040
CK-MB		1.52 (1.12–2.01)	0.007
	≤ 6.3	Reference
	> 6.3	13.0 (1.41–120.27)	0.024

COVID-19 = coronavirus disease 2019, OR = odds ratio, CI = confidence interval, CK-MB = creatine-kinase MB.