Table 3. Univariate regression analysis for mortality risk factors^a .

Variables		OR (95% CI)	P value
Age, ≥ 70 yr		17.217 (6.746–80.064)	< 0.001
Resident in care facility		2.819 (0.978–8.127)	0.055
Comorbidity
	Hypertension	1.902 (0.747–4.844)	0.178
	Diabetes mellitus	2.687 (1.054–6.846)	0.038
	Cardiovascular disease	1.775 (0.311–10.131)	0.518
	Dementia	1.125 (0.405–3.128)	0.821
	Malignancy	5.767 (1.296–25.661)	0.021
Symptoms on admission
	Dyspnea	2.439 (0.746–7.979)	0.140
	Febrile sensation	2.133 (0.864–5.266)	0.101
	Diarrhea	3.318 (0.696–15.812)	0.132
Physical examination
	Body temperature, > 37.5°C	18.549 (4.488–76.659)	< 0.001
	Systolic blood pressure, ≤ 90 mmHg	5.454 (1.248–23.839)	0.024
	O2 saturation, ≤ 90 mmHg	7.810 (1.842–33.112)	0.005
Chest imaging
	Bilateral infiltration	5.635 (1.223–25.974)	0.027
Laboratory findings
	Leukocyte, > 10.7 × 109/L	4.561 (1.363–15.263)	0.014
	Lymphocyte, < 1.0 × 109/L	3.883 (1.526–9.880)	0.004
	High aspartate aminotransferase	4.550 (1.796–11.577)	0.001
	High lactate dehydrogenase	4.412 (1.720–11.316)	0.002
	High creatinine	2.691 (0.863–8.389)	0.088
	Anemia	7.181 (2.571–20.060)	< 0.001
	Albumin, < 3.5 g/dL	7.488 (2.720–20.614)	< 0.001
	Erythrocyte sedimentation rate, > 20 mm/hr	4.357 (1.377–13.790)	0.012
	C-reactive protein	1.241 (1.132–1.360)	< 0.001

OR = odds ratio, CI = confidence interval.

^aAdjusted for age.