Author:
Zhou Zhonghan,Liao Limin,Li Xing,Wang Xuesheng,Li Xunhua,Zhao Hui,Deng Han,Liu Qinggang,Gao Yi,Jing Huafang
Abstract
Abstract
Background
To assess the inter-observer and intra-observer reliability of the magnetic resonance urography (MRU)—upper urinary tract dilation (UUTD) grading system.
Methods
A total of 40 patients with a diagnosis of NB were enrolled in this study. The images were assembled in an electronic presentation randomly. The presentations were reviewed and graded by 4 junior and 4 senior urologists. One week later, the images were randomized again and reassessed. The inter-observer reliability was estimated by Kendall’s coefficient of concordance and intra-class correlation coefficient (ICC), and the intra-observer reliability was estimated by weighted Cohen’s kappa.
Results
The inter-observer reliability strength was excellent for all urologists, with the ICC value of 0.939 (0.908–0.963) and Kendall’s W value of 0.967. The highest agreement was shown in Grade 4 at 92.50%, and the lowest in Grade 2 at 82.14%. All disagreements were within one grade of difference. Moreover, the Intra-observer reliability was excellent, with the weighted kappa value ranging from 0.904 to 0.954.
Conclusions
The inter-observer and intra-observer reliability of this novel MRU-UUTD grading system is confirmed, providing adequate evidence for broader clinical application.
Funder
Natural Science Foundation of China
Publisher
Springer Science and Business Media LLC
Subject
Urology,Reproductive Medicine,General Medicine