Development and Validation of the Insomnia Daytime Symptoms and Impacts Questionnaire (IDSIQ).

ABSTRACT:

Background and objective

Chronic insomnia has major consequences for daytime functioning, yet no fully validated patient-reported outcome instrument for once-daily assessments is available to measure these consequences. This study describes the development and psychometric evaluation of the Insomnia Daytime Symptoms and Impacts Questionnaire (IDSIQ).

Methods

The Daytime Insomnia Symptom Scale (DISS), an existing 20-item instrument for assessing daytime functioning, was modified to give an 18-item version of the IDSIQ (IDSIQ-18) based on iterative qualitative interviews with 54 subjects with insomnia and expert input. The construct validity and other psychometric properties of the IDSIQ-18 were analyzed based on an interventional study (NCT03056053) in which subjects with ins

SUBMITTER: Hudgens S 

PROVIDER: S-EPMC7884372 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature