Table 2.

Mortality rates of critical COVID-19 patients in ICUs without tracheostomy (Refs. [1–9])

Author	Time	No. patients ICU	Deaths
ICNAR, Great Britain [1]	At May 22	5330	54.4% (n = 2898)
Wu, China [2]	No data	2.087	49% (n = 1023)
Grasseli, Italy [3]	Jan 1–28, 2020	1.591	26% (n = 405)
Arent, USA [4]	Feb 1–March 5	15	67%
Wang, China [5]	Jan 1–25, 2020	13	15% (n = 6)
Huang, China [6]	Dec 16–Jan 28, 2020	36	16% (n = 6)
Yang, China [7]	No data	37	81% (n = 30)
Zhou, China [8]	Dec 29–Jan 31	32	96%
Yao, China [9]	24 h post intubations	202	10.40%