Screening of Urinary Tract Abnormalities Among Day and Nightwetting Children

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Abstract
In order to detect possible urinary tract abnormalities among wetters, assessments of previous history completed by ultrasonography of the urinary tract and uroflowmetry were obtained for 145 wetting children and a random sample of 156 sex-matched non-wetting children drawn from a population of 3375 seven-year-olds. Ultrasonography revealed abnromalities, including both morphological ones and cases with incomplete bladder emptying, in 5 out of 73 nightwetters (6.8%, 95% confidence limit, CL, 1.1–12.6), 10 out of 72 day and day and nightwetters (hereafter daywetters) (13.9%, CL 5.9–21.9) and 4 controls (2.6%, CL 0.1–5.0), the figure for the daywetters differing significantly from that for the controls (pp<0.05). Depending on the previous history and abnormal findings in ultrasonography or uroflowmetry, examinations were continued with intravenous pyelography, voiding cystography, cystoscopy and/or by cystometry. Finally, marked structural or functional disorders of the urinary tract were detected in 11 out of 72 daywetters (15.3%, CL 7.0–23.6), 1 out of 73 pure nightwetters and 1 out of 156 control children. It is concluded that imaging of the urinary tract is not necessary for pure nightwetters, while ultrasonography or uroflowmetry and more sophisticated radiological or urological methods should be focused on those children with daytime wetting and clinical symptoms of voiding disturbances.

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