Table 1. Descriptive statistics and correlations among primary study variables in individuals with anxiety and depressive disorders (N = 63).

		Mean	SD	1	2	3	4	5	6	7	8
1	PSQI	6.05	3.24
2	MFI	55.23	15.29	.47***
3	DBAS	30.72	10.08	53***	59***
4	SRBQ	39.98	16.38	.72***	.64***	.69***
5	GSES	4.26	3.11	.47***	.24	.49***	.46***
6	DASS-D	5.63	4.93	.26*	.59***	.46***	.50***	.30*
7	DASS-A	4.19	4.41	.15	.24	.36**	.34**	.34**	.53***
8	NEO-N	38.70	9.66	.13	.53***	.47***	.32*	.29*	.69***	.37**
9	NEO-E	37.70	8.76	−.17	−.48***	−.24	−.30*	−.06	−.53***	−.10	−.62***

Note: NEO-N = Five Factor Inventory-Neuroticism subscale; NEO-N = Five Factor Inventory-Extraversion subscale; DASS-D = Depression Anxiety Stress Scale-Depression subscale; DASS-A = Depression Anxiety Stress Scale-Anxiety subscale; DBAS = Dysfunctional Beliefs and Attitudes about Sleep; SRBQ = Sleep-Related Safety Behavior Questionnaire; GSES = Glasgow Sleep Effort Scale; PSQI = Pittsburgh Sleep Quality Index; MFI = Multidimensional Fatigue Inventory.

^*p < .05.

^**p < .01.

^***p < .001.