The role of urinary urgency and its measurement in the overactive bladder symptom syndrome: current concepts and future prospects

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Abstract
To review the concept of urinary urgency and its practical measurement in clinical trials, and advance the hypothesis that while urge is experienced by normal people, urgency is always pathological. According to the International Continence Society (ICS) definition, urgency is the primary symptom of the overactive bladder (OAB) syndrome, but in clinical trials there are inconsistencies in both the definition and assessment of urgency. We searched the PubMed and BIOSIS databases for publications and abstracts related to the clinical assessment of urgency in patients with OAB. The differentiation of urgency from the normal physiological desire to void is discussed. In clinical studies of OAB, urgency has been measured both qualitatively and quantitatively. Existing qualitative assessment scales for urgency are deficient in accuracy, validation or both, and are largely inconsistent with the currently accepted ICS definition of urgency. The quantitative assessment of urgency by diary entry has been validated and may be the most accurate, reproducible and clinically meaningful method available for measuring this variable. Based on the existing ICS definition of urgency as 'a compelling desire to pass urine that is difficult to defer', the concept of qualitative assessment of urgency may be flawed.