Clinical diagnosis of bladder outlet obstruction in patients with benign prostatic enlargement and lower urinary tract symptoms: development and urodynamic validation of a clinical prostate score for the objective diagnosis of bladder outlet obstruction.

PURPOSE We attempted to improve the method of objective clinical evaluation of patients with benign prostatic enlargement and lower urinary tract symptoms. MATERIALS AND METHODS We compared the results of free uroflowmetry and transrectal ultrasound prostate size determination with those of pressure-flow analysis of bladder outlet obstruction in 871 consecutive elderly men. RESULTS Maximal flow, prostate size, and post-void residual and voided volumes were correlated with bladder outlet obstruction to derive a clinical prostate score. CONCLUSIONS Clinical prostate score shows a superior correlation with bladder outlet obstruction than isolated objective parameters or symptom scores.