Improving the clinical prediction of detrusor overactivity by utilizing additional symptoms and signs to overactive bladder symptoms alone

Abstract

Introduction and hypothesis: We attempted to improve the accuracy of the clinical diagnosis of detrusor overactivity (DO) by using other significant clinical parameters in addition to overactive bladder (OAB) symptoms alone.

Methods: One thousand one hundred and forty women attending for their initial urogynecological assessment, including urodynamics, due to symptoms of pelvic floor dysfunction, underwent a comprehensive clinical and urodynamic assessment. Multivariate logistic regression analysis of a wide range of clinical parameters was used in order to determine a model of factors most accurately predicting the urodynamic diagnosis of DO. Data were separated according to women without DO; women with DO. The analysis involved the stepwise building of an optimal clinical model for predicting DO.

Results: In multivariate analysis, the OAB symptoms of urgency incontinence, urgency and nocturia (not frequency) were significantly associated with DO. Their prediction of DO was not particularly accurate (sensitivity 0.64; specificity 0.67). The addition of other significant clinical parameter, i.e. absent symptoms of stress incontinence; lower parity (0-1); no signs of prolapse, to the diagnostic model, resulted in marginally improved accuracy (area under the ROC curve increased from 0.70 to 0.74).

Conclusions: Overactive bladder symptoms alone are not accurate in predicting DO. Adding other significant clinical parameters to the model resulted in a small statistical advantage, which is not clinically useful. An accurate clinical diagnosis of DO in women would appear to remain elusive.