Clinical efficacy of tocilizumab treatment in severe and critical COVID-19 patients

Table 2 Improvement of oxygen therapy in patients before and after tocilizumab treatment

		The number of patients before treatment with tocilizumab
		ECMO (n = 1)	Invasive ventilator (n = 3)	High flow oxygen (n = 14)	Nasal catheter oxygen (n = 1)
Number of patients after treatment with tocilizumab	Death	0	1	3	0
	ECMO	0	0	0	0
	Invasive ventilator	1	1	0	0
	Noninvasive ventilator	0	1	0	0
	High flow oxygen	0	0	1	0
	Nasal catheter oxygen	0	0	6	0
	Non oxygen inhalation	0	0	4	1
	Improved	1 (100%)	1 (33.3%)	10 (71.4%)	1 (100%)

ECMO: Extracorporeal membrane oxygenation.