title: Portuguese Children's Sleep Habits Questionnaire - validation and cross-cultural comparison.
abstract: OBJECTIVE
  To validate the Portuguese version of the Children's Sleep Habits Questionnaire (CSHQ-PT) and compare it to the versions from other countries.
  
  
  METHODS
  The questionnaire was previously adapted to the Portuguese language according to international guidelines. 500 questionnaires were delivered to the parents of a Portuguese community sample of children aged 2 to 10 years old. 370 (74%) valid questionnaires were obtained, 55 children met exclusion criteria and 315 entered in the validation study.
  
  
  RESULTS
  The CSHQ-PT internal consistency (Cronbach's α) was 0.78 for the total scale and ranged from 0.44 to 0.74 for subscales. The test-retest reliability for subscales (Pearson's correlations, n=58) ranged from 0.59 to 0.85. Our data did not adjust to the original 8 domains structure in Confirmatory Factor Analysis but the Exploratory Factor Analysis extracted 5 factors that have correspondence to CSHQ subscales.
  
  
  CONCLUSIONS
  The CSHQ-PT evidenced psychometric properties that are comparable to the versions from other countries and adequate for the screening of sleep disturbances in children from 2 to 10 years old.
authors.affiliation: Developmental and Sleep Clinic, Hospital Cuf-Descobertas, Lisbon, Portugal. Electronic address: fs.sono@gmail.com.
authors.forename: Filipe Glória
authors.initials: FG
authors.lastname: Silva
authors.affiliation: Special Education Clinic, Hospital Cuf-Descobertas, Lisbon, Portugal.
authors.forename: Cláudia Rocha
authors.initials: CR
authors.lastname: Silva
authors.affiliation: Faculdade de Ciências Médicas, Universidade Nova de Lisboa, , Lisbon, Portugal.
authors.forename: Lígia Barbosa
authors.initials: LB
authors.lastname: Braga
authors.affiliation: Hospital Cuf-Descobertas, Lisbon, Portugal.
authors.forename: Ana Serrão
authors.initials: AS
authors.lastname: Neto
mesh_terms: D002648:Child; D002675:Child, Preschool; D003431:Cross-Cultural Comparison; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D010290:Parents; D011174:Portugal; D011594:Psychometrics; D015203:Reproducibility of Results; D012890:Sleep; D012893:Sleep Wake Disorders / Q000175:diagnosis*; D011795:Surveys and Questionnaires / Q000592:standards*; D014175:Translating
keywords: Child; Comparação transcultural; Confiabilidade; Criança; Cross-Cultural Comparison; Portuguese; Português; Questionnaire; Questionário; Reliability; Sleep; Sono; Validade; Validity