Table 2. Relationship between ISI and sleep problem.

Correlations
		Sleep problem	Insomnia Severity Index before	Insomnia Severity Index after
Sleep problem	Pearson Correlation	1	–0.4 (**)	–0.3 (**)
	Sig. (2-tailed)	.	0.0	0.0
	N	78	72	65
Insomnia Severity Index before	Pearson Correlation	–0.4 (**)	1	0.7 (**)
	Sig. (2-tailed)	0.0	.	0.0
	N	72	72	64
Insomnia Severity Index after	Pearson Correlation	–0.3 (**)	0.7 (**)	1
	Sig. (2-tailed)	0.0	0.0	.
	N	65	64	66