Correlation between Chest CT Severity Scores and the Clinical Parameters of Adult Patients with COVID-19 Pneumonia

Table 3

Maximum oxygen requirement in each CT severity category.

			Maximum O2 requirement						Total
			None	Nasal cannula	Face mask	Non-rebreather	HFNC/BIPAP	Intubation
CT severity	Negative	Count	196	5	0	0	1	1	203
		% within category	96.6%	2.5%	0.0%	0.0%	0.5%	0.5%	100.0%
		% of total	21.7%	0.6%	0.0%	0.0%	0.1%	0.1%	22.5%
	Mild	Count	293	24	4	1	1	6	329
		% within category	89.1%	7.3%	1.2%	0.3%	0.3%	1.8%	100.0%
		% of total	32.5%	2.7%	0.4%	0.1%	0.1%	0.7%	36.5%
	Moderate	Count	154	89	20	9	15	22	309
		% category	49.8%	28.8%	6.5%	2.9%	4.9%	7.1%	100.0%
		% of total	17.1%	9.9%	2.2%	1.0%	1.7%	2.4%	34.3%
	Severe	Count	2	8	8	5	4	34	61
		% within category	3.3%	13.1%	13.1%	8.2%	6.6%	55.7%	100.0%
		% of total	0.2%	0.9%	0.9%	0.6%	0.4%	3.8%	6.8%
Total		Count	645	126	32	15	21	63	902
		% of total	71.5%	14.0%	3.5%	1.7%	2.3%	7.0%	100.0%