title: [Validation of the sino-nasal outcome test in Chile].
abstract: BACKGROUND
  Allergic rhinitis and sinusitis are common diseases that affect quality of life of pediatric and adult patients.
  
  
  OBJECTIVE
  To adapt and validate the Sino-Nasal Outcome Test 20 indicators (SNOT-20) survey in Chilean subjects.
  
  
  METHODS
  In a psychometric validation study, an adapted version of the SNOT-20 adapted version was applied to 181 volunteers on two different occasions, three weeks apart. Feasibility (response time and perceived difficulty), reliability (internal consistency and test-retest) and validity (concurrent validity, correlating results with an independent instrument; predictive validity assessing its sensitivity to detect changes and discriminate validity, assessing receiver operating characteristic (ROC) curves), were assessed. An exploratory factor analysis was performed to confirm the presence of previously described underlying constructs.
  
  
  RESULTS
  Eighty percent of participants considered SNOT-20 easy to complete. This task was completed in less than 5 minutes. Cronbach's alpha was 0.946. Temporal stability on a healthy subgroup was strong with an intraclass correlation coefficient of 0.92. SNOT-20 had a correlation coefficient of 0.82 with an independent instrument and its score significantly decreased after 3 weeks of treatment (p = 0.003). The area under ROC curve was 0.895. Factor analysis identified four principal components which possessed identical structure as previously described.
  
  
  CONCLUSIONS
  SNOT-20 survey was valid, reliable and easy to implement among Chilean subjects.
authors: Departamento Otorrinolaringología, Pontificia Universidad Católica de Chile, Santiago, Chile. hayo.bk@gmail.com
authors: Hayo
authors: H
authors: Breinbauer
authors: Cecilia
authors: C
authors: Varela
authors: Mauricio
authors: M
authors: Núñez
authors: Soledad
authors: S
authors: Ugarte
authors: Raúl
authors: R
authors: Garfias
authors: Ximena
authors: X
authors: Fonseca
mesh_terms: D000328:Adult; D002677:Chile; D003466:Cultural Characteristics; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D011594:Psychometrics; D012220:Rhinitis / Q000175:diagnosis*; D012852:Sinusitis / Q000175:diagnosis*; D011795:Surveys and Questionnaires; D014175:Translating