Application of the postnatal urinary tract dilation classification system to predict the need for surgical intervention among neonates and young infants

The aim of this study was to validate the postnatal urinary tract dilation (UTD) classification system by correlating it with the need for surgical intervention. Young infants who underwent ultrasound (US) examinations for prenatal hydronephrosis were retrospectively identified. The kidney units (KU...

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Published in:Ultrasonography (Seoul, Korea) Korea), 2023-01, Vol.42 (1), p.136-146
Main Authors: Hwang, Jisun, Kim, Pyeong Hwa, Yoon, Hee Mang, Song, Sang Hoon, Jung, Ah Young, Lee, Jin Seong, Cho, Young Ah
Format: Article
Language:English
Subjects:
Bladder
Classification
Hydronephrosis
infant
Intervention
Kidneys
Original
Patients
Pediatrics
prognosis
Regression analysis
Reproducibility
reproducibility of results
ultrasonography
Urogenital system
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Summary:The aim of this study was to validate the postnatal urinary tract dilation (UTD) classification system by correlating it with the need for surgical intervention. Young infants who underwent ultrasound (US) examinations for prenatal hydronephrosis were retrospectively identified. The kidney units (KUs; right, left, or bilateral) were graded from UTD P0 (very low risk) to P3 (high risk) based on seven US criteria from the UTD system. Surgery-free survival curves were constructed using the Kaplan-Meier method. Univariable and multivariable Cox proportional-hazards regression analysis clustered by patients was performed. Interobserver agreement was analyzed using the weighted kappa coefficient. In total, 504 KUs from 336 patients (mean age, 18.3±15.9 days; range, 1 to 94 days; males, n=276) were included, with a median follow-up of 24.2 months. Fifty-eight KUs underwent surgical intervention. Significant differences were observed among the Kaplan-Meier curves stratified into UTD groups (P
ISSN:2288-5919
2288-5943
DOI:10.14366/usg.22035