Table 3.

Comparison of oxygenation index and respiratory index between the two groups (mean ± SD)

Indicators	T1	T2	T3
OI (mmHg)
Remimazolam group (n = 40)	398.6 ± 24.7	357.6 ± 28.0	381.8 ± 30.0
Propofol group (n = 40)	390.1 ± 26.3	338.1 ± 30.5	359.4 ± 33.8
t value	1.490	2.979	3.135
P value	0.140	0.004	0.002
RI
Remimazolam group (n = 40)	0.59 ± 0.17	0.90 ± 0.23	0.50 ± 0.18
Propofol group (n = 40)	0.62 ± 0.17	0.94 ± 0.21	0.56 ± 0.20
t value	-0.789	-0.812	-1.410
P value	0.432	0.419	0.162

OI: Oxygenation index; RI: Respiratory index; T1: After endotracheal intubation; T2: When the sternum was cut off; T3: When the machine was shut down.