The Sleep Condition Indicator: a clinical screening tool to evaluate insomnia disorder

Espie, C. A., Kyle, S. D., Hames, P., Gardani, M., Fleming, L. and Cape, J. (2014) The Sleep Condition Indicator: a clinical screening tool to evaluate insomnia disorder. BMJ Open, 4(3), e004183. (doi:10.1136/bmjopen-2013-004183)

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Abstract

Objective: Describe the development and psychometric validation of a brief scale (the Sleep Condition Indicator (SCI)) to evaluate insomnia disorder in everyday clinical practice.

Design: The SCI was evaluated across five study samples. Content validity, internal consistency and concurrent validity were investigated.

Participants: 30 941 individuals (71% female) completed the SCI along with other descriptive demographic and clinical information.

Setting: Data acquired on dedicated websites.

Results: The eight-item SCI (concerns about getting to sleep, remaining asleep, sleep quality, daytime personal functioning, daytime performance, duration of sleep problem, nights per week having a sleep problem and extent troubled by poor sleep) had robust internal consistency (α≥0.86) and showed convergent validity with the Pittsburgh Sleep Quality Index and Insomnia Severity Index. A two-item short-form (SCI-02: nights per week having a sleep problem, extent troubled by poor sleep), derived using linear regression modelling, correlated strongly with the SCI total score (r=0.90).

Conclusions: The SCI has potential as a clinical screening tool for appraising insomnia symptoms against Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5) criteria.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Espie, Professor Colin and Fleming, Dr Leanne and Gardani, Dr Maria and Kyle, Dr Simon
Authors: Espie, C. A., Kyle, S. D., Hames, P., Gardani, M., Fleming, L., and Cape, J.
College/School:College of Medical Veterinary and Life Sciences > Institute of Health and Wellbeing > Mental Health and Wellbeing
College of Medical Veterinary and Life Sciences > Institute of Neuroscience and Psychology
Journal Name:BMJ Open
Publisher:BMJ Publishing Group
ISSN:2044-6055
ISSN (Online):2044-6055
Copyright Holders:Copyright © 2014 The Authors
First Published:First published in BMJ Open 4(3):e004183
Publisher Policy:Reproduced under a Creative Commons License

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