Detrusor underactivity (DU) occurs in 9-48% of the population depending on age, sex and definition. We assessed the incidence and type of associated urodynamic findings in men and women diagnosed with DU following urodynamic assessment at our institution for refractory lower urinary tract symptoms in a 20-month period.

We retrospectively reviewed the urodynamic findings in 1155 (460 male) consecutive non-neuropathic patients having videourodynamics and conventional urodynamics between 31/5/16 and 3/1/18. Detrusor underactivity was defined as per 2002 ICS definition. Details on DU patient demographics and their urodynamic findings were determined and are detailed in Table 1. Statistical analysis was by T-Test and Chi-Square analysis and significance determined as P < 0.05.

101 patients (50 male) with no or problematic voiding studies were excluded. 370 patients (35%) had DU; 36% (167) of men and 34% (203) of women. Women with DU were significantly younger, they had significantly larger total and maximal functional capacity, and significantly higher Qmax then men with DU. Conversely, men with DU had significantly more reduced compliance, detrusor overactivity and urge urinary incontinence (See table 1).

DU affects a significant proportion of patients seen at our tertiary referral functional urology unit. Women with DU were significantly younger and had significantly larger total and maximal functional capacity than men with DU. Men with DU presented with significantly more detrusor overactivity and urge urinary incontinence.

DU was demonstrated in 35% of our patient population. Women tended to present with DU compared to men. Men presented with DU despite presenting with detrusor overactivity and urge urinary incontinence.