Validation of Instruments for Pragmatic Clinical Trials for Overactive Bladder

Overview

A. Objectives \& Hypothesis Overactive bladder (OAB) affects over 10 million adults in the United States and each year substantial costs are incurred from private and public funds to test the efficacy of new and existing drugs for OAB.14 However, effectiveness and adherence data from traditional clinical trials are not generalizable to clinical practice.3, 4 In an era of limited resources and competing demands, it is essential that cost-effectiveness data from clinical trials be generalizable to the clinical world. Pragmatic clinical trials measure the effectiveness of treatments in real clinical practice, and in the full spectrum of patients that require treatment.5 Pragmatic trials require patient reported outcomes that are valid but have low patient burden.5 The conduct of pragmatic clinical trials for OAB has been limited by a lack of instruments that have demonstrable validity and reliability in the typical clinical setting Pill counts, used to measure primary outcomes in most traditional trials, are burdensome in the clinical setting.1610 The optimal instrument for measuring utility scores, general quality of life scores for cost-effectiveness analyses for OAB, is also not known. Although poor adherence carries the potential for continued suffering for patients and wasted health care resources, there is a lack of data on the clinical and economic impact of poor adherence to treatment for OAB in real-world clinical practice. We have published preliminary data that underscores the role of adherence and utilities in the treatment of OAB. 3 Our hypothesis is that effectiveness, adherence, and utility preference scores can be measured using pragmatic patient reported instruments and that poor adherence is associated with lower effectiveness and quality of life in adults with OAB in a clinical setting. Specifically, the overriding goal of this proposal is to validate pragmatic instruments to measure effectiveness, adherence and utility preference scores and obtain preliminary data on the effect of adherence and quality of life in adults undergoing treatment for overactive bladder in a clinical setting.

Specific Aim 1: To determine the validity and responsiveness of pragmatic patient reported outcome instruments to measure clinical effectiveness, adherence and utility preference scores in adults undergoing treatment with anti-cholinergic medications for overactive bladder. We will perform a prospective cohort study of adults with OAB undergoing treatment with anti-cholinergic medication. We will compare improvement in urinary symptoms (clinical effectiveness), adherence, and change in utility preference scores from baseline to 3 months of treatment using new and existing 'gold standard' instruments. The results will be informative as to which, if any of these pragmatic instruments, is useful for measuring effectiveness, adherence, and utility preference scores in the 'real world' clinical setting. Specific Aim 2: To use the newly validated pragmatic instruments to measure the impact of adherence on clinical effectiveness and health related quality of life in a real world clinical setting in adults undergoing treatment with anti-cholinergic medications for overactive bladder. The impact of adherence on clinical effectiveness and health related quality of life will be measured through comparisons in adults with high and low adherence to anti-cholinergic medication. This aim will corroborate the findings of aim 1 and establish if pragmatic instruments are useful in measuring outcomes of effectiveness, adherence and utility preference scores. These results will also provide preliminary data on the effectiveness of anti-cholinergic medication and the impact of adherence on clinical effectiveness and quality of life in the clinical setting.