Insomnia Symptom Questionnaire (ISQ)

The Insomnia Symptom Questionnaire (ISQ) is a rigorously validated, self-administered diagnostic tool designed to efficiently identify chronic insomnia based on established clinical criteria, offering a multidimensional and cost-effective alternative to traditional diagnostic methodologies.

Description

The Insomnia Symptom Questionnaire (ISQ) is a psychometrically evaluated instrument intended for the identification of chronic insomnia in adult populations. It functions as a self-report survey incorporating symptomatology grounded in widely accepted diagnostic frameworks. The ISQ employs both classical test theory and item response theory (IRT) methodologies to refine its scoring system, culminating in a dichotomous classification outcome indicative of insomnia presence or absence. The questionnaire's design captures various dimensions of insomnia symptomatology, encompassing difficulties in initiating sleep, maintaining sleep, and associated functional impairments. The validated scoring algorithm, derived using IRT analysis, enhances the precision of insomnia classification by weighting individual item responses in relation to their diagnostic significance. This approach enables the ISQ to provide a reliable, reproducible assessment capable of being administered at scale without the resource-intensive demands inherent to polysomnography or clinician-led diagnostic interviews.

Applications

- Large-scale epidemiological studies investigating the prevalence and correlates of chronic insomnia in diverse populations.
- Clinical research requiring standardized, efficient screening tools for insomnia symptoms in community-based cohorts.
- Longitudinal investigations assessing the trajectory or treatment outcomes of insomnia where resource constraints preclude polysomnographic monitoring.
- Public health surveillance initiatives aiming to quantify insomnia-related morbidity across demographic subgroups, including target populations such as menopausal women.
- Preliminary clinical screening tools in primary care or sleep clinics to guide subsequent diagnostic evaluations or interventions.
- Integration into digital health platforms for remote, self-administered insomnia symptom assessment.

Advantages

- Large-scale epidemiological studies requiring cost-effective, standardized insomnia screening
- Health services research evaluating the burden and correlates of sleep disorders
- Clinical trial enrollment and outcome assessment in sleep medicine and psychiatry
- Population health surveillance programs tracking insomnia prevalence across demographic groups
- Digital health platforms and telehealth services seeking validated, self-administered sleep disorder screening tools

Invention Readiness

The ISQ is validated instrument with an established scoring algorithm that produces a clinically interpretable outcome.

IP Status

Related Publication(s)

Okun, Michele L., et al. "Psychometric evaluation of the Insomnia Symptom Questionnaire: a self-report measure to identify chronic insomnia." Journal of Clinical Sleep Medicine 5.1 (2009): 41-51. https://doi.org/10.5664/jcsm.27391