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Measurement properties of the Minimal Insomnia Symptom Scale (MISS) as an insomnia screening tool among adults and the elderly
Högskolan i Kristianstad.
Uppsala Universitet.
Linnaeus University, Faculty of Health and Life Sciences, Department of Health and Caring Sciences. Blekinge Tekniska Högskola.
Blekinge Tekniska Högskola ; Blekinge Kompetenscentrum.
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2015 (English)In: Sleep Medicine, ISSN 1389-9457, E-ISSN 1878-5506, Vol. 16, no 3, p. 379-384Article in journal (Refereed) Published
Abstract [en]

Background: The psychometric properties of the 3-item Minimal Insomnia Symptom Scale (MISS) have been evaluated using classical test theory. Different cut-offs for identifying insomnia have been suggested in two age groups (≥6 and ≥7 among adult and elderly people, respectively). The aim of this study was to test the measurement properties of the MISS using the Rasch measurement model, with special emphasis on differential item functioning by gender and age.

Methods: Cross-sectional MISS data from adult (age 20-64 years; n=1075) and elderly (age 65+; n=548) populations were analysed by the Rasch measurement model.

Results: Data generally met Rasch model requirements and the scale could separate between two distinct groups of people, but there was differential item functioning by age. The difference between the adult and elderly samples was lower for the originally recommended ≥6 points cut-off (0.09 logits) than for the ≥7 points cut-off (0.23 logits), but greater at the lower and higher ends of the scale.

Conclusions: This study provides support for the measurement properties of the MISS. However, caution should be exercised in comparing raw MISS scores between age groups, but applying a ≥6 cut-off appears to allow for valid comparisons between adults and elderly

Place, publisher, year, edition, pages
2015. Vol. 16, no 3, p. 379-384
National Category
Nursing
Research subject
Health and Caring Sciences, Nursing
Identifiers
URN: urn:nbn:se:lnu:diva-42159DOI: 10.1016/j.sleep.2014.10.016ISI: 000351714400014Scopus ID: 2-s2.0-84925271474OAI: oai:DiVA.org:lnu-42159DiVA, id: diva2:802012
Available from: 2015-04-10 Created: 2015-04-10 Last updated: 2018-03-29Bibliographically approved

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Hellström, AmandaFagerström, Cecilia

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  • apa
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