title: Responsiveness of the Dutch Endometriosis Health Profile-30 (EHP-30) questionnaire.
abstract: OBJECTIVE
  To evaluate the responsiveness to change and the minimal clinical important difference (MCID) of the Dutch Endometriosis Health Profile-30 (EHP-30) questionnaire.
  
  
  METHODS
  Prospective cohort study among endometriosis patients attending the Radboud University Nijmegen Medical Centre and members of the Dutch endometriosis patient-support group. EHP-30 was measured at baseline and after 6 months. Changes in treatment were recorded, as well as the subjective change in symptoms. Effect sizes and index of responsiveness were evaluated as appropriate. The MCID was estimated with use of the change in scores in women reporting to feel 'somewhat better' after 6 months.
  
  
  RESULTS
  228 women were included. Effect sizes varied from 0.1 to 0.5 in the complete group and from 0.3 to 1.1 in the group of women who reported improvement. Index of responsiveness ranged from 0.1 to 0.7 on the eleven dimensions of the questionnaire. MCID was 3.2-17.5 depending on the dimension.
  
  
  CONCLUSIONS
  The Dutch EHP-30 is sensitive to change and represents a useful tool in future research on the effect of endometriosis treatment on health status.
authors: Department of Obstetrics & Gynaecology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands. Electronic address: tanjavdburgt@hotmail.com.
authors: Tanja J M
authors: TJ
authors: van de Burgt
authors: Kirsten B
authors: KB
authors: Kluivers
authors: Jan C M
authors: JC
authors: Hendriks
mesh_terms: D000328:Adult; D015331:Cohort Studies; D004715:Endometriosis / Q000628:therapy*; D005260:Female; D006304:Health Status; D006801:Humans; D008875:Middle Aged; D009426:Netherlands; D011446:Prospective Studies; D011788:Quality of Life; D011795:Surveys and Questionnaires / Q000592:standards*