Influence of preoperative comprehensive education on anxiety, depression, pain, and sleep in elderly patients operated under general anesthesia

Table 3 Inter-group comparison of sleep disturbances, n (%)

Indicators	Research group (n = 86)	Control group (n = 77)	χ2	P value
Difficulty in falling asleep for the first time	3 (3.49)	7 (9.09)	-	-
Difficulty in falling asleep again after waking up frequently at night	2 (2.33)	8 (10.39)	-	-
Difficulty in falling asleep again after waking up early	2 (2.33)	5 (6.49)	-	-
Difficulty in falling asleep all night	0 (0.00)	3 (3.90)	-	-
Total	7 (8.14)	23 (29.87)	12.771	< 0.001

The inter-group comparison of categorical data was conducted using the χ² test.