Table 6.

Differences in the PSQI scores at different time points (score, $\overline{x}$ ± s).

Group	24 h after surgery	48 h after surgery	7 d after surgery
Combined anesthesia group (n = 142)	12.35 ± 2.72	8.64 ± 1.95∗#	4.74 ± 1.32∗#
The control group (n = 143)	13.04 ± 2.86	9.73 ± 2.11∗#	6.38 ± 1.59∗#
T	−2.087	−4.528	−9.470
P	0.038	<0.001	<0.001
Between groups	F = 5.551, P=0.000
Different points in time	F = 5.288, P=0.000
Between groups · different time points	F = 4.837, P=0.000

Note. ^∗ P < 0.05 compared with 24 h after surgery, P < 0.05; ^#P < 0.05 compared with 48 h after surgery.