Table 3.

Comparison of S100-β protein levels (μg/L, $\overline{x}$ ± s).

Group	Before the operation	Immediately after surgery	6 h after surgery	12 h after surgery	24 h after surgery
Combined anesthesia group (n = 142)	0.21 ± 0.06	1.54 ± 0.47∗	1.71 ± 0.62∗#	1.92 ± 0.69∗#&	2.01 ± 0.32∗#&
The control group (n = 143)	0.22 ± 0.05	2.23 ± 0.54∗	2.59 ± 0.71∗#	2.77 ± 0.74∗#&	2.96 ± 0.34∗#&Δ
t	−1.529	−11.503	−11.142	−10.027	−24.286
P	0.127	<0.001	<0.001	<0.001	<0.001
Between groups	F = 5.672, P=0.000
Different points in time	F = 5.154, P=0.000
Between groups · different time points	F = 4.741, P=0.000

Note. ^∗ Comparison with preoperative, P < 0.05; ^#Comparison with immediately after surgery, P < 0.05; ^&Comparison with 6 h after surgery, P < 0.05; ^△Comparison with 12 h after surgery, P < 0.05.