title: [Validity and reliability of the Duke-UNC-11 questionnaire of functional social support].
abstract: OBJECTIVE
  The aim of this study is to analyse the validity and reliability of the functional social support questionnaire, Duke-UNC-11.
  
  
  METHODS
  Descriptive. Crossover study.
  
  
  METHODS
  Urban health centre.
  
  
  METHODS
  656 patients were interviewed in their homes. 60 had the questionnaire repeated (30 self-filled and 30 using an interviewer) an average of 6 days later.
  
  
  RESULTS
  The intraclass correlation coefficients of the 11 items in the Duke-UNC-11 were above 0.50, for both self-filled and interviewer questionnaires; the ones on the scale were 0.92 and 0.80, respectively. The factorial analysis separated two sub-scales, confidential support (7 items) and affective support (4 items). Low social support was significantly associated to: being over 40, widowed or divorced, living alone, over-user, worse subjective health, greater chronic morbidity, mental health disorder and family dysfunction. The multiple linear regression equation managed to explain 30% of the variability of social support, in which family function (family APGAR) explained 23.5%, education 3.3%, perception of internal health control 2%, mental health 1.2% and perception of susceptibility to/seriousness of illness 0.3%.
  
  
  CONCLUSIONS
  The questionnaire Duke-UNC-11 is valid and reliable.
authors.affiliation: Centro de Salud Zaidín-Sur y Facultad de Medicina de Granada.
authors.forename: J A
authors.initials: JA
authors.lastname: Bellón Saameño
authors.forename: A
authors.initials: A
authors.lastname: Delgado Sánchez
authors.forename: J D
authors.initials: JD
authors.lastname: Luna del Castillo
authors.forename: P
authors.initials: P
authors.lastname: Lardelli Claret
mesh_terms: D000328:Adult; D018592:Cross-Over Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012944:Social Support; D011795:Surveys and Questionnaires / Q000592:standards*
vernacular_title: Validez y fiabilidad del cuestionario de apoyo social functional Duke-UNC-11.