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No association between elevated post-void residual volume and bacteriuria in residents of nursing homes

Objective To evaluate the concept that increased post-void residual urine volume (PVR) is a risk factor for bacteriuria. Design Cross-sectional study. Setting Three nursing homes in Jönköping, southern Sweden. Subjects A total of 147 elderly residents in municipal nursing homes. Main outcome values PVR volumes measured with a portable ultrasonic bladder scan, urine specimen, and questionnaire data on incontinence, immobility, impaired cognition, neurological diseases, and medications. Results Mean age was 86 years and 78% were women. The prevalence of a PVR for the four chosen cut-off values (30, 50, 100, and 150 ml) was 51%, 39%, 20%, and 7%, respectively. The prevalence of bacteriuria was 42%, 46% for women and 28% for men. Elevated PVR was not associated with bacteriuria, incontinence, immobility, impaired cognition or neurological disease (stroke, Parkinson's disease). Conclusion Bacteriuria and elevated PVR are common among elderly residents in nursing homes. The study could not confirm that elevated PVR predisposes to bacteriuria in elderly residents in nursing homes.