title: Psychometric evaluation of health-related quality-of-life measures after pelvic organ prolapse surgery.
abstract: OBJECTIVE
  To evaluate the psychometric characteristics of the Pelvic Floor Distress Inventory (PFDI-20), the Pelvic Floor Impact Questionnaire (PFIQ-7), and the Patient Global Impression of Change (PGIC) among women undergoing pelvic organ prolapse (POP) repair surgery.
  
  
  METHODS
  Data were collected at baseline and 12 months from 2 single-arm trials of surgical repair of POP using mesh. At each time point, internal consistency reliability (Cronbach's α) was calculated for the PFDI-20 and PFIQ-7 total scores and for each subscale. Concurrent validity was assessed with baseline and follow-up data using Spearman's rank-order correlation coefficients. Responsiveness was assessed by calculating change scores from baseline to each follow-up visit, effect sizes, standard error of measurement (SEM), and using PFDI-20 and PFIQ-7 change scores stratified by PGIC.
  
  
  RESULTS
  The women (N=275: study 1, n=148; study 2, n=127) had a mean (SD) of 64.4 (10.3) years of age. At baseline, the women had a mean (SD) stage II (n=83), stage III (n=173), or stage IV (n=19) POP quantification. At baseline, the internal consistency reliability of the PFDI-20 full and subscales ranged from 0.64 to 0.85, and that of the PFIQ-7 ranged from 0.89 to 0.96. Concurrent validity was good for the PFDI-20 and PFIQ-7 (r range, 0.35-0.59). The PFDI-20, the PFIQ-7, and the PGIC were responsive.
  
  
  CONCLUSIONS
  The PFDI-20, the PFIQ-7, and the PGIC are psychometrically sound measures of patients' perceptions of change after POP surgery and will be useful for those interested in evaluating perceptions of patients undergoing surgical POP repair.
authors: United BioSource Corporation, Bethesda, MD 20814, USA. Heather.Gelhorn@unitedbiosource.com
authors: Heather L
authors: HL
authors: Gelhorn
authors: Karin S
authors: KS
authors: Coyne
authors: Vanja
authors: V
authors: Sikirica
authors: Judi
authors: J
authors: Gauld
authors: Miles
authors: M
authors: Murphy
mesh_terms: D000368:Aged; D015331:Cohort Studies; D005260:Female; D006305:Health Status Indicators; D006801:Humans; D008875:Middle Aged; D057240:Patient Preference; D056887:Pelvic Organ Prolapse / Q000503:physiopathology / Q000523:psychology* / Q000601:surgery*; D011237:Predictive Value of Tests; D011594:Psychometrics; D011788:Quality of Life; D015203:Reproducibility of Results; D012647:Self-Assessment; D016896:Treatment Outcome