The relationship between illness perception and worsening of interstitial cystitis/painful bladder syndrome symptoms: A cross‐sectional study

Abstract

Objective: To evaluate disease perception in a cohort of patients with interstitial cystitis/painful bladder syndrome (IC/PBS) using the Brief Illness Perception-Questionnaire (BIP-Q) and to evaluate how this might relate to disease severity. Materials and Methods: The study is a cross-sectional survey amongst members of Bladder Health UK who had previously received a clinical diagnosis of IC/PBS. A hyperlink containing the questionnaire was sent to the patient group's website and interested members accessed and completed the survey. Participants' inclusion was based on a prior clinical diagnosis of IC/PBS, current O'Leary Sant scores supportive of the diagnosis, and age between 18 and 80. A sample size of 171 was used in the study. The Brief Illness Perception Questionnaire (BIP-Q) and the O'Leary/Sant symptoms and problem indices questionnaire were used to collect data. A multivariable logistic regression analysis was used to test the relationship between items of BIP-Q and severity of IC/PBS. Content analysis was used for the causal domain and subsequently analysed as percentages. Results: Six hundred and one members accessed the questionnaire of whom 159 returned completed questionnaires. One hundred and twenty-two of 159 (≥75%) respondents believe that their illness will continue indefinitely. The majority of the respondents indicated that IC/PBS had a negative impact on their daily lives, caused them worry and made them emotionally unstable. Of the 8 BIP-Q items, those most predictive of disease severity were (adjusted odd ratio and confidence intervals): consequence 0.094 (0.023–0.386); treatment control 2.702 (1.256–5.812); identity 0.141 (0.033–0.600); concern 9.363 (1.521–57.632). Conclusions: Our findings show that IC/PBS negatively impacts participant's quality of life and emotional wellbeing. Higher expectation for treatment benefit and increasing levels of patient concern are predictive for severity of IC/PBS.

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