title: Evaluation of the French version of the 4-item index of the Acne-QoL (AcneQ4fr).
abstract: BACKGROUND
  The 4-item index of the 19-item Acne-Quality of Life (Acne-QoL) has been validated in English (AcneQ4). French translation and linguistic validation of the Acne-QoL have recently been completed (Acne-QoLfr).
  
  
  OBJECTIVE
  This study sought to evaluate reliability and responsivity of the French version of the AcneQ4 (AcneQ4fr).
  
  
  METHODS
  Calculation of intraclass correlation coefficients (ICC) and regression modeling was performed to evaluate reliability (comparing Day 0 to Day 2-3 responses) and responsivity (comparing Day 0 to Day 60+ responses).
  
  
  RESULTS
  Thirty-four native French-speaking acne subjects in Quebec, Canada (n = 20) and France (n = 14) completed the Acne-QoLfr on 3 occasions over 3 months (Day 0, Day 2-3, and Day 60+). Of 14 completed responses for Day 0 and Day 2-3, ICC for AcneQ4fr was 0.73 (with 95 % confidence interval (0.348, 0.905) and P value 0.001), and mean score difference was 0.85 (range of possible scores for AcneQ4fr: 0-24; P = 0.41). Of 19 completed responses for Day 0 and Day 60+, ICC for Acne-Q4fr was 0.45 (with 95 % confidence interval (0.046, 0.728) and P value 0.015) and mean score difference was 4.14 (P = 0.001).
  
  
  CONCLUSIONS
  The abbreviated AcneQ4fr is somewhat reflective of the entire Acne-QoLfr and by its brevity may facilitate psychometric evaluation of francophone acne patients in routine practice.
authors.affiliation: Department of Medicine, University of Western Ontario, London, ON, Canada. jerrytan@bellnet.ca
authors.forename: Jerry
authors.initials: J
authors.lastname: Tan
authors.forename: Ashley
authors.initials: A
authors.lastname: O'Toole
authors.forename: Xuemao
authors.initials: X
authors.lastname: Zhang
authors.forename: Brigitte
authors.initials: B
authors.lastname: Dreno
authors.forename: Yves
authors.initials: Y
authors.lastname: Poulin
mesh_terms: D000152:Acne Vulgaris / Q000523:psychology*; D000328:Adult; D002170:Canada; D005260:Female; D006801:Humans; D007802:Language; D008297:Male; D008875:Middle Aged; D011594:Psychometrics; D011788:Quality of Life / Q000523:psychology*; D011792:Quebec; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires / Q000592:standards*; D055815:Young Adult