Table 2.

Pre ECMO patient characteristics

Study (author and year)	Patients admitted to ICU	Patients receiving ECMO (total =194)	Age	ARDS Berlin grading	Days of ventilation pre ECMO
Zhou et al. (2020) [17]	59	5	55.6	N/A	5 (1-20)
Zhang et al. (2020) [18]	48	10	55	GRADE II	N/A
Takeda et al. (2020) [19]	N/A	26	71	GRADE III	3 (0-9)
Jacobs et al. (2020) [20]	N/A	85	52	GRADE III	4 (2.5-6.5)
Yang et al. (2020) [21]	N/A	6	59.7	N/A	N/A
Ruan et al. (2020) [22]	62	7	50	N/A	N/A
Li et al. (2020) [23]	20	8	64.25	GRADE III	6 (0-21)
Guan et al. (2020) [24]	37	5	47	N/A	N/A
Zeng et al (2020) [25]	12	12	50.9	N/A	N/A
Beyls et al. (2020) [26]	N/A	16	62	N/A	4 (1.5-7.5)
Osho et al. (2020) [27]	N/A	6	47	N/A	5.5 (3.5-6.75)
Haye et al. (2020) [28]	N/A	8	57.2	GRADE III	4 (1-9)

N/A not available