Conversion and reliability of two urological grading systems in infants: the Society for Fetal Urology and the urinary tract dilatation ... View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2016-10-10

AUTHORS

Miran Han, Hyun Gi Kim, Jung-Dong Lee, Seon Young Park, Young Keun Sur

ABSTRACT

BackgroundThe urinary tract dilation (UTD) classification system was proposed in 2014.ObjectiveTo evaluate the correspondence and reliability of two US grading systems for postnatal urinary tract dilatation in infants: the Society for Fetal Urology (SFU) and the UTD systems.Materials and methodsWe assessed 180 kidneys in infants younger than 1 year. Four radiologists assessed the kidneys twice using both the SFU system (grades 0 to 4) and the UTD system (grades normal, P1, P2, P3). The SFU system was re-categorized into SFU-A (grades 0, 1–2, 3, 4) and into SFU-B (grades 0–1, 2, 3, 4). The Cohen kappa statistic was used for estimating agreement of both UTD–SFU-A and UTD–SFU-B.ResultsThe Cohen kappa was significantly higher between UTD and SFU-B as compared to the UTD and SFU-A (0.75 vs. 0.50, P < 0.001). Intra-observer agreement was similar for the two grading systems (SFU 0.64–0.88 vs. UTD 0.48–0.92, P = 0.050–0.885). SFU grades 2 and 3 showed fair to moderate inter-observer agreement and corresponding UTD grades P1 and P2 showed moderate to substantial agreement. The overall inter-observer agreement was significantly higher for the UTD system than for the SFU system during the first assessment (95% confidence interval [CI]: right kidney, −0.069 to −0.062; left kidney, −0.048 to −0.043).ConclusionCorrespondence between the systems was poor using a recommended re-categorization (SFU-A). An alternative re-categorization (SFU-B) was found to be more appropriate for establishing correspondence between the systems. Both systems were reliable, with good intra- and inter-observer agreement for the assessment of infant kidneys, but the UTD system had better inter-observer agreement. More... »

PAGES

65-73

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s00247-016-3721-9

DOI

http://dx.doi.org/10.1007/s00247-016-3721-9

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1010774339

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/27725992


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