Table 3.

Comparison of Insomnia severity index between the two groups

ISI score	Control group (n = 40)	Observation group (n = 40)	t value	P value
Before treatment	17.85 ± 2.74	17.78 ± 2.76	0.122	0.903
2 weeks after treatment	15.63 ± 3.65	12.63 ± 4.01	3.499	< 0.001
4 weeks after treatment	13.75 ± 2.42	10.83 ± 3.15	4.658	< 0.001
6 weeks after treatment	11.90 ± 2.31	7.58 ± 2.15	8.679	< 0.001
8 weeks after treatment	8.73 ± 1.11	5.63 ± 1.00	13.101	< 0.001

ISI: Insomnia severity index.