title: Self-administered version of the Fabry-associated pain questionnaire for adult patients.
abstract: BACKGROUND
  Fabry-associated pain may be the first symptom of Fabry disease (FD) and presents with a unique phenotype including mostly acral burning triggerable pain attacks, evoked pain, pain crises, and permanent pain. We recently developed and validated the first Fabry Pain Questionnaire (FPQ) for adult patients. Here we report on the validation of the self-administered version of the FPQ that no longer requires a face-to-face interview but can be filled in by the patients themselves allowing more flexible data collection.
  
  
  METHODS
  At our Würzburg Fabry Center for Interdisciplinary Treatment, Germany, we have developed the self-administered version of the FPQ by adapting the questionnaire to a self-report version. To do this, consecutive Fabry patients with current or past pain history (n = 56) were first interviewed face-to-face. Two weeks later patients' self-reported questionnaire results were collected by mail (n = 55). We validated the self-administered version of the FPQ by assessing the inter-rater reliability agreement of scores obtained by supervised administration and self-administration of the FPQ.
  
  
  RESULTS
  The FPQ contains 15 questions on the different pain phenotypes, on pain development during life with and without therapy, and on impairment due to pain. Statistical analysis showed that the majority of questions were answered in high agreement in both sessions with a mean AC1-statistic of 0.857 for 55 nominal-scaled items and a mean ICC of 0.587 for 9 scores.
  
  
  CONCLUSIONS
  This self-administered version of the first pain questionnaire for adult Fabry patients is a useful tool to assess Fabry-associated pain without a time-consuming face-to-face interview but via a self-reporting survey allowing more flexible usage.
authors.affiliation: Department of Neurology, University of Würzburg, Würzburg, Germany. magg_b@ukw.de.|Würzburg Fabry Center for Interdisciplinary Therapy (FAZIT), University of Würzburg, Würzburg, Germany. magg_b@ukw.de.
authors.forename: Barbara
authors.initials: B
authors.lastname: Magg
authors.affiliation: Institute of Clinical Epidemiology and Biometry, University of Würzburg, Würzburg, Germany. christoph.riegler@web.de.
authors.forename: Christoph
authors.initials: C
authors.lastname: Riegler
authors.affiliation: Institute of Clinical Epidemiology and Biometry, University of Würzburg, Würzburg, Germany. wiedmann_s@ukw.de.|Comprehensive Heart Failure Center, University of Würzburg, Würzburg, Germany. wiedmann_s@ukw.de.
authors.forename: Silke
authors.initials: S
authors.lastname: Wiedmann
authors.affiliation: Institute of Clinical Epidemiology and Biometry, University of Würzburg, Würzburg, Germany. heuschmann_p@ukw.de.|Comprehensive Heart Failure Center, University of Würzburg, Würzburg, Germany. heuschmann_p@ukw.de.|Clinical Trial Center Würzburg, University Hospital Würzburg, Würzburg, Germany. heuschmann_p@ukw.de.
authors.forename: Peter
authors.initials: P
authors.lastname: Heuschmann
authors.affiliation: Department of Neurology, University of Würzburg, Würzburg, Germany. sommer@uni-wuerzburg.de.|Würzburg Fabry Center for Interdisciplinary Therapy (FAZIT), University of Würzburg, Würzburg, Germany. sommer@uni-wuerzburg.de.
authors.forename: Claudia
authors.initials: C
authors.lastname: Sommer
authors.affiliation: Department of Neurology, University of Würzburg, Würzburg, Germany. ueceyler_n@ukw.de.|Würzburg Fabry Center for Interdisciplinary Therapy (FAZIT), University of Würzburg, Würzburg, Germany. ueceyler_n@ukw.de.
authors.forename: Nurcan
authors.initials: N
authors.lastname: Üçeyler
mesh_terms: D000328:Adult; D000368:Aged; D015331:Cohort Studies; D000795:Fabry Disease / Q000175:diagnosis* / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000175:diagnosis* / Q000453:epidemiology; D010147:Pain Measurement / Q000379:methods* / Q000592:standards*; D057566:Self Report / Q000592:standards*; D011795:Surveys and Questionnaires / Q000592:standards; D055815:Young Adult