Table 2. Rate of IRVS need and 30-day mortality in included studies.

IRVS: intensive respiratory or vasopressor support

Studies	IRVS (%)	Mortality (%)
Alici et al, 2015 [11]	65.48	7.14
Chalmers et al, 2008 [12]	16.42	-
Charles et al, 2008 [10]	6.38	-
Davis et al, 2010 [13]	29.89	-
Ehsanpoor et al, 2019 [2]	38.46	20.28
Fukuyama et al, 2011 [14]	-	10.07
Hamza et al, 2019 [15]	-	22.37
Masuduzzaman et al, 2020 [16]	-	5.56
Williams et al, 2021 [17]	-	23.48