Insomnia Subtypes in Clinical Population According to the Insomnia Type Questionnaire (ITQ): A Multi-Centre Study in Spanish Sleep Clinics.

ABSTRACT: The lack of robust subtyping for insomnia disorder (ID) led to its current classification as a uniform condition. A novel approach to subtyping ID developed a new tool, the insomnia type questionnaire (ITQ). Our research aimed to assess whether the ID subtypes identified in the general population could also be found in ID patients referred to sleep clinics in a multi-centre study throughout Spain, and to gather insights for the management of complex ID patients. The ITQ classified ID patients into the five previously described subtypes: Type 1 = 35.1%, Type 2 = 12%, Type 3 = 46.7%, Type 4 = 5.8% and Type 5 = 0.4%. Compared to the general population, there was an overrepresentation of Types 1 and 3, consistently across all participating clinical centres. The total self-reported sleep durati

SUBMITTER: Canellas F 

PROVIDER: S-EPMC12856099 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature