Table 3.

Correlations between sleep and mental parameters.

		AIS score	FSS score	PSQI score	GAD-7 score	PHQ-9 score
AIS Score	Pearson correlation coefficient (r)	1	0.496	0.684	0.556	0.633
	p		<0.001	<0.001	<0.001	<0.001
FSS score	Pearson correlation coefficient (r)	0.496	1	0.426	0.506	0.609
	p	<0.001		<0.001	<0.001	<0.001
PSQI score	Pearson correlation coefficient (r)	0.684	0.42	1	0.487	0.566
	p	<0.001	<0.001		<0.001	<0.001
GAD-7 score	Pearson correlation coefficient (r)	0.556	0.506	0.487	1	0.704
	p	<0.001	<0.001	<0.001		0.000
PHQ-9 score	Pearson correlation coefficient (r)	0.633	0.609	0.566	0.704	1
	p	<0.001	<0.001	<0.001	<0.001

AIS, Athens Insomnia Scale; FSS, Fatigue Severity Scale; PSQI, Pittsburgh Sleep Quality Index; GAD-7, General Anxiety Disorder-7; PHQ-9, Patient Health Questionnaire-9.