Searchable Title

Sleep Condition Indicator: A Clinical Screening Tool to Evaluate Insomnia Disorder. Copyright: Creative Commons License.

Reference Type

Journal Article

Authors, Section

Espie, C. A.; Kyle, S. D.; Hames, P.; Gardani, M.; Fleming, L.; Cape, J.

Title, Section

Sleep Condition Indicator: A Clinical Screening Tool to Evaluate Insomnia Disorder. Copyright: Creative Commons License.

Publication Year

2014

Journal Title

BMJ Open

Volume

4

Issue

3

Pages

e004183

Availability

online

PMID

PMID: 24643168

DOI

10.1136/bmjopen-2013-004183

Abstract

Full text is in supplementary file. 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.

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