Psychometric properties of an insomnia-specific measure of worry: The Anxiety and Preoccupation about Sleep Questionnaire
Författare
Summary, in English
The aim of this study was to examine the psychometric properties of the Anxiety and Preoccupation about Sleep Questionnaire (APSQ), with a focus on factorial validity and internal consistency as well as discriminative, convergent, and association with sleep parameters and daytime impairment. Among a randomly selected sample from the general population (N = 5,000), 2,333 participants completed a survey on nighttime symptoms, daytime symptoms, health outcomes, and psychological processes. The study sample consisted of 1800 participants who did not fulfill criteria for another sleep disorder than insomnia. A two-factor solution, accounting for 70.7% of the variance, was extracted from the 10 APSQ items. One six-item factor determined worries about the consequences of poor sleep (a = .91); the second factor, with four items, assessed worries about the uncontrollability of sleep (a = .86). The two factors were significantly intercorrelated (r = .65)and significantly associated with the total APSQ (rs = .97 and .76, respectively). The APSQ and the two subscales showed discriminant validity between three sleep status groups (normal sleep, poor sleep, and insomnia disorder; R2 = .33–.41). The APSQ and the subscales demonstrated convergent
validity with measures on cognitive arousal, sleep-related beliefs, anxiety, and depression. They also were significantly correlated with sleep parameters and daytime impairment. The findings suggest that the APSQ is a psychometrically sound instrument for assessing worry in insomnia.
validity with measures on cognitive arousal, sleep-related beliefs, anxiety, and depression. They also were significantly correlated with sleep parameters and daytime impairment. The findings suggest that the APSQ is a psychometrically sound instrument for assessing worry in insomnia.
Avdelning/ar
Publiceringsår
2011
Språk
Engelska
Sidor
65-76
Publikation/Tidskrift/Serie
Cognitive Behaviour Therapy
Volym
40
Dokumenttyp
Artikel i tidskrift
Förlag
Taylor & Francis
Ämne
- Psychology
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1651-2316