The Psychometric Properties of the Arabic Version of the Anxiety and Preoccupation About Sleep Questionnaire (APSQ)

Figures & data

Table 1 Descriptive Results of the Sleep Preoccupation Scale (SPS)/Anxiety and Preoccupation About Sleep Questionnaire (APSQ) n = 523

Variable	Mean	SD	Skewness	Kurtosis
Age	23.62	7.5	2.85	9.68
Ht (kg)	161.43	8.65	0.63	0.29
Wt (cm)	61.07	15.23	1.03	1.81
BMI kg/cm^2	23.29	4.78	0.72	0.52
APSQ1	2.99	1.16	−0.1	−1.01
APSQ2	3.4	1.08	−0.43	−0.62
APSQ3	3.42	1.07	−0.5	−0.54
APSQ4	2.98	1.1	−0.09	−0.84
APSQ5	3.31	1.07	−0.4	−0.56
APSQ6	3.03	1.17	−0.11	−0.96
APSQ7	3.24	1.12	−0.35	−0.7
APSQ8	3.17	1.15	−0.33	−0.72
APSQ9	2.94	1.19	0.01	−0.97
APSQ10	2.8	1.18	0.16	−0.9
APSQ Total	31.28	8.31	−0.06	−0.08
APSQ F1	19.34	5.1	−0.21	−0.15
APSQ F2	11.94	3.87	−0.02	−0.46

Notes: Results expressed as arithmetic mean and standard deviations. APSQ F1 = APSQ Factor 1 (Worries about the consequences of poor sleep). APSQ F2 = APSQ Factor 2 (Worries about the uncontrollability of sleep).

Abbreviations: AIS, Athens Insomnia Scale; GAD-7, Generalized Anxiety Disorders.

Table 2 Reliability Analysis Coefficients of the Anxiety and Preoccupation About Sleep Questionnaire (APSQ) n = 523

Scale	Cronbach’s α	McDonald’s ω	Intraclass Coefficient ICC
APSQ	0.91	0.91	0.93
F1 APSQ	0.87	0.87	0.88
F2 APSQ	0.84	0.85	0.89

Notes: ICC was based on a subsample of 80 participants only. APSQ F1 = APSQ Factor 1 (Worries about the consequences of poor sleep). APSQ F2 = APSQ Factor 2 (Worries about the uncontrollability of sleep).

Table 3 Confirmatory Factor Analysis of the Anxiety and Preoccupation About Sleep Questionnaire (APSQ) n = 523

Factor	Indicator	Estimate	SE	Z	p
F1	APSQ1	0.83	0.05	17.95	<0.001
	APSQ2	0.8	0.04	18.85	<0.001
	APSQ3	0.82	0.04	20.13	<0.001
	APSQ4	0.67	0.05	14.8	<0.001
	APSQ5	0.81	0.04	19.58	<0.001
	APSQ7	0.83	0.04	19.14	<0.001
F2	APSQ6	0.82	0.05	17.36	<0.001
	APSQ8	0.84	0.05	18.46	<0.001
	APSQ9	0.98	0.05	21.68	<0.001
	APSQ10	0.93	0.05	20.45	<0.001

Notes: Estimate represents factor loading. APSQ F1 = APSQ Factor 1 (Worries about the consequences of poor sleep). APSQ F2 = APSQ Factor 2 (Worries about the uncontrollability of sleep).

Table 4 Intercorrelations of the Anxiety and Preoccupation About Sleep Questionnaire (APSQ) and Convergent Validity of the Athens Insomnia Scale (AIS) and Generalized Anxiety Disorders (GAD-7)

	ASPQ Total	ASPQ F1	ASPQ F2	AIS	GAD-7
ASPQ Total	–			0.85*	0.69*
ASPQ F1	0.94*	–		0.59*	0.66*
ASPQ F2	0.90*	0.71*	–	0.57*	0.66*

Notes: Anxiety and Preoccupation about Sleep Questionnaire (APSQ) is based on the entire sample n = 523. Convergent validity of the test with Athens Insomnia Scale (AIS) and Generalized Anxiety Disorders (GAD-7) is based on subsample of 80 participants only. APSQ F1 = APSQ Factor 1 (Worries about the consequences of poor sleep). APSQ F2 = APSQ Factor 2 (Worries about the uncontrollability of sleep). *represent p values < 0.001, respectively.