Table 3.

Multivariate predictors of bacterial pneumonia versus COVID-19 or influenza versus COVID-19.

	Characteristic	Odds ratio (95% CI)	P value
Bacterial pneumonia to COVID-19	WBC (×109/L)
	3.5–9.5	Reference
	<3.5	5.531 (0.569–53.756)	0.140
	>9.5	0.134 (0.026–0.699)	0.017
	Monocytes (%)
	<10%	Reference
	>10%	1.838 (0.966–3.498)	0.064
	Eosinophils (%)
	>0.4%	Reference
	<0.4%	6.654 (2.210–20.027)	0.001
	SAA (mg/L)
	<10	Reference
	>10	2.798 (0.826–9.479)	0.098
Influenza to COVID-19	Age (years)	2.255 (0.856–5.941)	0.100
	WBC (×109/L)
	3.5–9.5	Reference
	<3.5	0.172 (0.010–3.099)	0.233
	>9.5	0.247 (0.008–7.260)	0.418
	Neutrophil (%)
	<75%	Reference
	>75%	0.691 (0.207–2.311)	0.549
	Monocytes (%)
	<10%	Reference
	>10%	0.147 (0.042–0.521)	0.003
	NLR
	<3.72	Reference
	>3.72	0.141 (0.024–0.811)	0.028
	LMR
	<2.74	96.442 (8.332–1116.248)	<0.001
	>2.74	Reference

WBC = white blood cell; SAA = serum amyloid A; NLR = neutrophil-to-lymphocyte ratio; LMR = lymphocyte-to-monocyte ratio.