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Gepubliceerd in: Quality of Life Research 9/2011

01-11-2011

Development and psychometric evaluation of a new patient-reported outcome instrument measuring the functional impact of insomnia

Auteurs: Christopher Bell, Lori D. McLeod, Lauren M. Nelson, Sheri E. Fehnel, Laurie J. Zografos, Brian Bowers

Gepubliceerd in: Quality of Life Research | Uitgave 9/2011

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Abstract

Purpose

The objective of this study was to develop and validate a patient-reported outcome instrument to comprehensively assess the consequences of inadequate sleep for use in insomnia-related studies.

Methods

To inform item development, relevant constructs were identified through patient focus groups, literature review, and expert input. Following a translatability assessment for United States (US) English, US Spanish, and French, the draft items were refined through iterative sets of patient interviews in the United States and France. Psychometric properties were evaluated using patient responses from a validation study including 432 participants with either a diagnosis of primary insomnia or no history of insomnia.

Results

Psychometric analyses supported item reduction from 38 to 26 items, yielding a unidimensional scale and preserving the original content (mood, tiredness/energy, memory/concentration, motivation, daily performance, social interaction, sexual functioning). Evidence of internal consistency (coefficient α = 0.97), convergent validity, and known-groups validity also was documented.

Conclusions

The Sleep Functional Impact Scale (SFIS) is a psychometrically sound measure targeting the impact of insomnia on patient functioning. When administered with a sleep diary, this instrument has the ability to provide a more comprehensive assessment of treatment response in clinical studies.
Bijlagen
Alleen toegankelijk voor geautoriseerde gebruikers
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Metagegevens
Titel
Development and psychometric evaluation of a new patient-reported outcome instrument measuring the functional impact of insomnia
Auteurs
Christopher Bell
Lori D. McLeod
Lauren M. Nelson
Sheri E. Fehnel
Laurie J. Zografos
Brian Bowers
Publicatiedatum
01-11-2011
Uitgeverij
Springer Netherlands
Gepubliceerd in
Quality of Life Research / Uitgave 9/2011
Print ISSN: 0962-9343
Elektronisch ISSN: 1573-2649
DOI
https://doi.org/10.1007/s11136-011-9885-8

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