Millions of Americans—most of them women—suffer from a bladder condition known as interstitial cystitis

According to a new study of this disorder, fewer than 10% of women with symptoms of interstitial cystitis are actually diagnosed with the disorder, even though it severely affects their lives. Without a proper diagnosis, women with interstitial cystitis are missing out on treatments that might bring them some relief.

Bladder Pain Syndrome, Interstitial Cystitis, American, Women, bladder, Urology

Bladder pain syndrome or interstitial cystitis is a poorly understood condition that can cause serious disability. We provide the first population-based symptom prevalence estimate to our knowledge among United States adult females.

Materials and Methods from the American Urology Association’s Study

We developed and validated 2 case definitions to identify bladder pain syndrome or interstitial cystitis symptoms. Beginning in August 2007 we telephoned United States households, seeking adult women with bladder symptoms or a bladder pain syndrome and interstitial cystitis diagnosis. Second stage screening identified those subjects who met case definition criteria. Each completed a 60-minute interview on the severity and impact of bladder symptoms, health care seeking, and demographics. Data collection ended in April 2009.

Using population and nonresponse weights we calculated prevalence estimates based on definitions spanning a range of sensitivity and specificity. We used United States Census counts to estimate the number of affected women in 2006. The random sample included 146,231 households, of which 131,691 included an adult female. Of these households, 32,474 reported an adult female with bladder symptoms or diagnosis, of which 12,752 completed the questionnaire.

Results

Based on the high sensitivity definition 6.53% (95% CI 6.28, 6.79) of women met symptom criteria. Based on the high specificity definition 2.70% (95% CI 2.53, 2.86) of women met the criteria.

These percentages translate into 3.3 to 7.9 million United States women 18 years old or older with bladder pain syndrome or interstitial cystitis symptoms. Symptom severity and impact were comparable to those of adult women with established diagnoses. However, only 9.7% of the women reported being assigned a bladder pain syndrome or interstitial cystitis diagnosis.

Prevalence of Symptoms of Bladder Pain Syndrome-Interstitial Cystitis Among Adult Females in the United States.
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