Assessing UK specialists' knowledge of the diagnostic criteria for painful bladder syndrome/interstitial cystitis

The aim of this study was to assess UK clinicians' knowledge of the National Institute of Diabetes, Digestive and Kidney diseases (NIDDK) criteria for painful bladder syndrome (PBS)/interstitial cystitis (IC). A questionnaire survey was distributed nationally to 100 gynaecologists and urologists. The main outcome measure was to determine whether respondents knew the NIDDK diagnostic criteria for PBS/IC. All respondents cared for women with lower urinary tract dysfunction in their daily practice; 40% had a special interest in urogynaecology. Most (83%) knew that urgency, frequency and pain are required to diagnose PBS/IC; however, few were aware of exclusion/inclusion criteria. The minority perform double fill at cystoscopy, and only 56% were aware that glomerulations and/or Hunner's ulcers are required to diagnose IC. Urologists with a special interest in female urology answered nearly 75% of the questionnaire correctly in contrast to less than 40% of general gynaecologists. The findings suggest misdiagnosis of PBS/IC may be widespread in the UK. The NIDDK criteria are complex and appear to be of little relevance in clinical practice highlighting the need for more clearly defined diagnostic criteria.