title: Proposing the Clinical Inventory of Sleep Quality.
abstract: BACKGROUND
  The aim of the study was to propose the Clinical Inventory of Sleep Quality (CISQ), and compared it with the Pittsburgh sleep quality index (PSQI).
  
  
  METHODS
  We studied 400 subjects with the CISQ. Cronbach'salphacoefficient was calculated to measure the reliability, and to determine the concurrent validity, a Canonical correlation analysis was performed. At next, we used an exploratory and confirmatory Factorial analysis with Varimax rotation for validity construct calculation.
  
  
  RESULTS
  Cronbachalphacoefficient of the scale was significantly strong (α=0.81). Canonic correlation was=0.93, suggesting that data proved that the CISQ and PSQI are measuring identical subject. Confirmatory Factorial analysis model grouped items of the scale in four factors: 1. Daytime symptoms, 2. Nocturnal symptoms, 3. Sleep disordered breathing symptoms, and 4. Sleep-related movement disorders symptoms. We proposed five categories to score CISQ in a range of 0-52 points, as follows: Good quality of sleep, Mild bad sleep quality, Moderate bad sleep quality, Severe bad sleep quality, and Profound bad sleep quality.
  
  
  CONCLUSIONS
  CISQ is a promising tool to measure sleep quality and deserve more research to confirm its utility.
authors.affiliation: Department of Statistics, Universidad Veracruzana, Xalapa, México.
authors.forename: Karen A
authors.initials: KA
authors.lastname: Fernández-Cruz
authors.affiliation: Clinic of Sleep Disorders, Universidad Nacional Autónoma de México, Mexico City, México.
authors.forename: Ulises
authors.initials: U
authors.lastname: Jiménez-Correa
authors.affiliation: School of Psychology, Universidad Cooperativa de Colombia, Bogotá, Colombia.
authors.forename: Hernán A
authors.initials: HA
authors.lastname: Marín-Agudelo
authors.affiliation: Department of Statistics, Universidad Veracruzana, Xalapa, México.
authors.forename: Claudio
authors.initials: C
authors.lastname: Castro-López
authors.affiliation: Clinic of Sleep Disorders, Universidad Nacional Autónoma de México, Mexico City, México.
authors.forename: Adrián
authors.initials: A
authors.lastname: Poblano
keywords: Pittsburgh sleep quality index; Reliability; Sleep quality; Validity