title: Regensburg Insomnia Scale (RIS): a new short rating scale for the assessment of psychological symptoms and sleep in insomnia; study design: development and validation of a new short self-rating scale in a sample of 218 patients suffering from insomnia and 94 healthy controls.
abstract: BACKGROUND
  The Regensburg Insomnia Scale (RIS) is a new self-rating scale to assess cognitive, emotional and behavioural aspects of psychophysiological insomnia (PI) with only ten items. A specific purpose of the new scale is the evaluation of the outcome of insomnia- specific cognitive behaviour therapy (CBT-I).
  
  
  METHODS
  Internal consistency of the RIS has been validated in 218 patients with PI. For determining sensitivity and specificity, this sample has been compared to 94 healthy controls. Sensitivity to change and pre-post cross-validation with the Pittsburgh Sleep Quality Index (PSQI) has been tested in a separate sample of 38 patients with PI undergoing CBT-I.
  
  
  RESULTS
  RIS distinguishes well between controls and patients with PI. Internal consistency was within a good range (Cronbach alpha = .890). RIS was sensitive for detecting improvements after CBT-I in sleep parameters and target symptoms such as sleep-related thinking.
  
  
  CONCLUSIONS
  The RIS is a valid and feasible instrument for assessing psychological PI-symptoms and sleep parameters.
authors.affiliation: Department of Psychiatry and Psychotherapy, University Regensburg, Universitaetsstrasse 84, Regensburg 93042, Germany. tatjana.croenlein@medbo.de
authors.forename: Tatjana
authors.initials: T
authors.lastname: Crönlein
authors.forename: Berthold
authors.initials: B
authors.lastname: Langguth
authors.forename: Roland
authors.initials: R
authors.lastname: Popp
authors.forename: Helmut
authors.initials: H
authors.lastname: Lukesch
authors.forename: Christoph
authors.initials: C
authors.lastname: Pieh
authors.forename: Göran
authors.initials: G
authors.lastname: Hajak
authors.forename: Peter
authors.initials: P
authors.lastname: Geisler
mesh_terms: D000328:Adult; D015928:Cognitive Behavioral Therapy / Q000379:methods; D035061:Control Groups; D003430:Cross-Sectional Studies; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D025341:Principal Component Analysis; D011569:Psychiatric Status Rating Scales; D015203:Reproducibility of Results; D012107:Research Design; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D012890:Sleep / Q000502:physiology; D007319:Sleep Initiation and Maintenance Disorders / Q000175:diagnosis / Q000523:psychology*; D011795:Surveys and Questionnaires / Q000592:standards*