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

Colin A Espie, Simon D Kyle, Peter Hames, Maria Gardani, Leanne Fleming, John Cape

Research output: Contribution to journalArticle

73 Citations (Scopus)

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.

LanguageEnglish
Article numbere004183
Pages1-5
Number of pages5
JournalBMJ Open
Volume4
Issue number3
DOIs
Publication statusPublished - 1 Mar 2014

Fingerprint

Sleep Initiation and Maintenance Disorders
Sleep
Psychometrics
Diagnostic and Statistical Manual of Mental Disorders
Linear Models

Keywords

  • insomnia
  • sleep disorder
  • sleep condition indicator
  • sleep quality

Cite this

Espie, Colin A ; Kyle, Simon D ; Hames, Peter ; Gardani, Maria ; Fleming, Leanne ; Cape, John. / The Sleep Condition Indicator : a clinical screening tool to evaluate insomnia disorder. In: BMJ Open. 2014 ; Vol. 4, No. 3. pp. 1-5.
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The Sleep Condition Indicator : a clinical screening tool to evaluate insomnia disorder. / Espie, Colin A; Kyle, Simon D; Hames, Peter; Gardani, Maria; Fleming, Leanne; Cape, John.

In: BMJ Open, Vol. 4, No. 3, e004183, 01.03.2014, p. 1-5.

Research output: Contribution to journalArticle

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