Gammie A, et al. - Authors sought to ascertain what difference the inclusion of patients with coexisting detrusor overactivity (DO) makes to the signs and symptoms of patients with detrusor underactivity (DU). They noted that compared to patients having DU with DO, patients who have DU without DO demonstrate differences in signs and symptoms. Compared to males with DU without DO, males with DO in addition to DU had higher age and number of daily micturitions, were more likely to report urgency with or without urgency incontinence, lower volumes for first desire to void, volume voided, and post-void residual urine, lower abdominal pressure at Q_max and were less likely to report a history of retention or reduced bladder filling sensation. Compared to females with DU without DO, females with DO in addition to DU had higher age and BMI, and were more likely to report urgency incontinence, higher day and night pad usage, constipation, had reduced anal tone and lower volumes for first desire to void, volume voided, and post-void residual urine, and lower abdominal pressure at Q_max.