title: A Spanish version of the Skin Cancer Index: a questionnaire for measuring quality of life in patients with cervicofacial nonmelanoma skin cancer.
abstract: BACKGROUND
  The Skin Cancer Index (SCI) is the first specific patient-reported outcome measure for patients with cervicofacial nonmelanoma skin cancer. To date, only the original English version has been published.
  
  
  OBJECTIVE
  To develop a Spanish version of the SCI that is semantically and linguistically equivalent to the original, and to evaluate its measurement properties in this different cultural environment.
  
  
  METHODS
  A cross-sectional study was conducted of the cultural adaptation and empirical validation of the questionnaire, analysing the psychometric properties of the new index at different stages.
  
  
  RESULTS
  Of 440 patients recruited to the study, 431 (95%) completed the Spanish version of the SCI questionnaire, in a mean time of 6·3 min (SD 2·9). Factor analysis of the scale revealed commonality and loading values of < 0·5 for three of the 15 items. The remaining 12 items converged into two components: appearance/social aspects (seven items) and emotional aspects (five items). Both domains presented a high level of internal consistency, with Cronbach's alpha values above 0·8. The convergent-discriminant validity analysis produced correlations higher than 0·3 for the mental component of the Short Form Health Survey-12v2 Health Questionnaire (correlation coefficient 0·39) and the Dermatology Quality of Life Index (correlation coefficient -0·30). In the test-retest, nine of the 12 items produced a weighted kappa value exceeding 0·4, and for the remaining three items, the absolute agreement percentage exceeded 60%.
  
  
  CONCLUSIONS
  The Spanish version of the SCI quality of life scale has been satisfactorily adapted and validated for use in Spanish-speaking countries and populations.
authors.affiliation: Department of Dermatology, Hospital Costa del Sol, Marbella, Spain; Spanish Research Network on Health Care in Chronic Diseases (REDISSEC), Spain.
authors.forename: M
authors.initials: M
authors.lastname: de Troya-Martín
authors.forename: F
authors.initials: F
authors.lastname: Rivas-Ruiz
authors.forename: N
authors.initials: N
authors.lastname: Blázquez-Sánchez
authors.forename: I
authors.initials: I
authors.lastname: Fernández-Canedo
authors.forename: M
authors.initials: M
authors.lastname: Aguilar-Bernier
authors.forename: J B
authors.initials: JB
authors.lastname: Repiso-Jiménez
authors.forename: J C
authors.initials: JC
authors.lastname: Toribio-Montero
authors.forename: M
authors.initials: M
authors.lastname: Jones-Caballero
authors.forename: J
authors.initials: J
authors.lastname: Rhee
mesh_terms: D000368:Aged; D002280:Basal Cell Carcinoma / Q000523:psychology*; D002294:Carcinoma, Squamous Cell / Q000523:psychology*; D003430:Cross-Sectional Studies; D005153:Facial Neoplasms / Q000523:psychology; D005260:Female; D006258:Head and Neck Neoplasms / Q000523:psychology*; D006801:Humans; D008297:Male; D011594:Psychometrics; D011788:Quality of Life; D018434:Sickness Impact Profile; D012878:Skin Neoplasms / Q000523:psychology*; D013030:Spain; D011795:Surveys and Questionnaires