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. 2015 Dec;4(6):594-9.
doi: 10.3978/j.issn.2223-4683.2015.11.01.

Test-retest reliability and discriminant validity for the Brazilian version of "The Interstitial Cystitis Symptom Index and Problem Index" and "Pelvic Pain and Urgency/Frequency (PUF) Patient Symptom Scale" instruments

Marcella Lima Victal  1 , Carlos Arturo Levi D'Ancona  1 , Roberto Gomes Junqueira  1 , Daniel Carlos da Silva  1 , Henrique Ceretta Oliveira  1 , Maria Helena Baena de Moraes Lopes  1
Affiliations

Test-retest reliability and discriminant validity for the Brazilian version of "The Interstitial Cystitis Symptom Index and Problem Index" and "Pelvic Pain and Urgency/Frequency (PUF) Patient Symptom Scale" instruments

Marcella Lima Victal et al. Transl Androl Urol. 2015 Dec.

Abstract

Background: The purpose is to evaluate the psychometric properties of reliability and discriminant validity of the Brazilian Portuguese versions of two instruments used in the diagnosis of interstitial cystitis (IC): "The Interstitial Cystitis Symptom Index and Problem Index" (The O'Leary-Sant), and "Pelvic Pain and Urgency/Frequency (PUF) Patient Symptom Scale".

Methods: Three groups of patients were examined: a study group (subjects with IC), control group 1 (individuals with at least one IC symptom), and control group 2 (subjects without IC symptoms). Test-retest stability was evaluated at intervals of 3 to 7 days in the study group. Discriminant validity was examined in all three groups.

Results: The intraclass correlation coefficient (ICC) [95% confidence interval (CI)] results were 0.56 (range, 0.21-0.78) for The O'Leary-Sant Symptom Index, 0.48 (range, 0.10-0.73) for The O'Leary-Sant Problem Index, and 0.49 (range, 0.12-0.74) for the PUF. To analyze discriminant validity between groups, we used Fisher's exact test and odd ratio (OR) to identify differences. We obtained a P value<0.0001, which indicated that the null hypothesis was rejected; in other words, there was evidence that at least two different groups were compared to the proportion of patients with IC.

Conclusions: The analyzed instruments did not reach appropriate values for reliability. Future studies are needed to analyze the psychometric measures of these instruments on a larger sample of patients with IC.

Keywords: Diagnosis; interstitial cystitis (IC); questionnaires; validation study.

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Conflict of interest statement

Conflicts of Interest: The authors have no conflicts of interest to declare.

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