Clinical predictors and significance of postvoid residual volume in women with diabetes.

Aims: To identify women with diabetes at risk of increased postvoid residual volume (PVR) and investigate the relationship of increased PVR to urinary symptoms in women with diabetes.

Methods: PVR was measured by bladder ultrasonography in a cross-sectional cohort of 427 middle-aged and older women with diabetes. Participants completed questionnaires assessing urgency incontinence, stress incontinence, daytime frequency, nocturia, obstructive voiding, and diabetes-related end-organ complications: heart disease, stroke, neuropathy. Serum HbA1c and creatinine were recorded.

Results: 75% of participants had a PVR of 0-49, 13% had a PVR of 50-99, and 12% had a PVR ≥ 100 mL. Approximately 59% of women with a PVR < 50 mL reported at least one lower urinary tract symptom. Women with diabetes and a PVR ≥ 100 mL were more likely to report urgency incontinence (OR 2.18, CI 1.08-4.41) and obstructive voiding symptoms (OR 2.47, CI 1.18-5.17) than women with PVR < 50 mL. In multivariable models, poorer glycemic control was associated with an increased likelihood of PVR ≥ 100 mL (OR 1.30, CI 1.06-1.59 per 1.0-U increase in HbA1c).

Conclusions: PVR volumes ≥ 100 mL may indicate increased risk of urgency incontinence and obstructive voiding. Glycemic control may play a role in preventing increased PVR in women with diabetes.