Variability of post-void residual urine volume in the elderly

Urological Research
D J GriffithsP N McCracken

Abstract

Residual urine volume, though clinically important as a diagnostic tool, is reported to be variable and unreliable. Variability was examined among 14 geriatric patients, mean age 77 years. Residual urine was measured by ultrasound at three different times of day on each of two visits separated by 2-4 weeks. Results were examined by analysis of variance. Mean residual urine was 154 ml. Between-patient variability was large [standard deviation (SD) 246 ml]. There was no significant difference between values in men and women, nor between visits. Within-patient variability was large because of a large systematic variation with time of day (SD 128 ml), with greatest volumes in the early morning. The inherent, random variability of the measurement was much smaller than this (SD 44 ml). If the physiological factors causing the temporal variation could be controlled, more reproducible measurements would be possible.

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Citations

Jul 5, 2003·Aging Clinical and Experimental Research·Avital HershkovitzShai Brill
Feb 14, 2013·Der Urologe. Ausg. A·B AmendK-D Sievert
Feb 7, 2004·Archives of Gerontology and Geriatrics·Avital HershkovitzShai Brill
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