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Psychometric properties of an insomnia-specific measure of worry: the anxiety and preoccupation about sleep questionnaire
Örebro University, School of Law, Psychology and Social Work. (CHAMP)ORCID iD: 0000-0003-2059-1621
Department of Psychology, Berkeley University.
Psykologiska insitutionen, Lunds universitet.
Örebro University, School of Law, Psychology and Social Work.ORCID iD: 0000-0003-2008-0784
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2011 (English)In: Cognitive Behaviour Therapy, ISSN 1650-6073, E-ISSN 1651-2316, Vol. 40, no 1, p. 65-76Article in journal (Refereed) Published
Abstract [en]

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 (ρ = .65) and significantly associated with the total APSQ (ρs = .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.

Place, publisher, year, edition, pages
2011. Vol. 40, no 1, p. 65-76
Keyword [en]
insomnia, sleep, worry, scale
National Category
Psychology
Research subject
Psychology
Identifiers
URN: urn:nbn:se:oru:diva-13462DOI: 10.1080/16506073.2010.538432OAI: oai:DiVA.org:oru-13462DiVA, id: diva2:386075
Available from: 2011-01-12 Created: 2011-01-12 Last updated: 2017-12-11Bibliographically approved

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Jansson-Fröjmark, MarkusNorell-Clarke, AnnikaLinton, Steven J.

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