Patients subpopulations Mortality Mortality Mortality Mechanical ventilation Mechanical ventilation Mechanical ventilation
Delta Omicron p Delta Omicron p
All patients, % (n/N)
10.8 (53/490)
11.4 (31/272)
>0.05
7.8 (38/490)
2.2 (6/272)
0.002
SpO2≤95%, % (n/N)
11.8 (51/431)
14.3 (28/196)
>0.05
7.9 (34/431)
3.1 (6/196)
0.02
SpO2≤95%, 0-5 days, % (n/N) 13.3 (31/233) 14.3 (23/161) >0.05 7.7 (18/233) 2.5 (4/161) 0.03
SpO2≤95%, 0-5 days, >60 years, % (n/N)
19.5 (30/154)
15.4 (22/143)
>0.05
9.1 (14/154)
2.1 (3/143)
0.01
SpO2≤95%, 0-5 days, >80 years, % (n/N)
35.3 (18/51
21.4 (12/56)
>0.05
7.8 (4/51)
1.8 (1/56)
>0.05