title: Statistical validation of the shorter-moldwin food sensitivity questionnaire for patients with interstitial cystitis/bladder pain syndrome.
abstract: OBJECTIVE
  American Urological Association guidelines suggest dietary changes as first line treatment for interstitial cystitis/bladder pain syndrome. We previously developed a validated survey instrument to determine which foods, beverages and supplements exacerbate the symptoms of this condition. In this study we developed a shortened questionnaire that would provide an easily self-administered food symptom history useful for clinical practice and future research.
  
  
  METHODS
  Using data from our previously validated food sensitivity questionnaire we remodeled the original lengthy survey to an abbreviated list including the 35 most problematic comestibles. The instrument was reviewed by a panel of experts for face and content validity, and tested for internal consistency, readability and clarity, and test-retest reliability.
  
  
  RESULTS
  Of the 124 patients who completed a baseline questionnaire 52 (42%) returned the second instrument 1 week after completing the first instrument. Internal consistency was high (α=0.96). A total of 47 patients (90.4%) indicated that they were food sensitive. Questionnaire test-retest reliability assessed by the Spearman correlation coefficient ranged from moderate (ρ=0.48 for Equal®) to very strong (ρ=0.90 for beer). Discrepancies between the survey instruments in individual comestibles occurred only 1% of the time.
  
  
  CONCLUSIONS
  Our short form diet history questionnaire based on a previously validated long form is a reliable, newly validated instrument that will help identify comestibles associated with interstitial cystitis/bladder pain syndrome symptoms. Its brevity makes it simple to administer and useful for dietary management in this population.
authors: Department of Nutrition, Long Island University Post, Brookville, New York; Department of Urology, Smith Institute for Urology, New Hyde Park, New York. Electronic address: Bshorter@liu.edu.
authors: Barbara
authors: B
authors: Shorter
authors: Biostatistics Unit, Feinstein Institute for Medical Research, North Shore-Long Island Jewish Health System, Manhasset, New York.
authors: Meredith
authors: M
authors: Ackerman
authors: Department of Urology, Smith Institute for Urology, New Hyde Park, New York.
authors: Michael
authors: M
authors: Varvara
authors: Department of Urology, Smith Institute for Urology, New Hyde Park, New York.
authors: Robert M
authors: RM
authors: Moldwin
mesh_terms: D000328:Adult; D018856:Cystitis, Interstitial / Q000150:complications* / Q000175:diagnosis; D005260:Female; D005512:Food Hypersensitivity / Q000150:complications* / Q000175:diagnosis; D006801:Humans; D008297:Male; D008875:Middle Aged; D009518:New York / Q000453:epidemiology; D017699:Pelvic Pain / Q000175:diagnosis / Q000453:epidemiology / Q000209:etiology*; D015995:Prevalence; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires
keywords: cystitis; diet; interstitial; nutrition; questionnaires; urinary bladder