Cheeloo College of Medicine, Shandong University; Department of Urology, China Rehabilitation Research Center, Beijing, 100068, China.
University of Health and Rehabilitation Sciences, Qingdao, Shandong, China.
BMC Urol. 2022 Jul 4;22(1):97. doi: 10.1186/s12894-022-01039-y.
To assess the inter-observer and intra-observer reliability of the magnetic resonance urography (MRU)-upper urinary tract dilation (UUTD) grading system.
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.
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.
The inter-observer and intra-observer reliability of this novel MRU-UUTD grading system is confirmed, providing adequate evidence for broader clinical application.
评估磁共振尿路造影（MRU）-上尿路扩张（UUTD）分级系统的观察者间和观察者内可靠性。
本研究共纳入 40 例 NB 诊断患者。将图像以电子演示的形式随机组合。由 4 名初级泌尿科医生和 4 名高级泌尿科医生对演示进行回顾和分级。一周后，再次对图像进行随机化并重新评估。采用 Kendall 协调系数和组内相关系数（ICC）评估观察者间可靠性，采用加权 Cohen's kappa 评估观察者内可靠性。
所有泌尿科医生的观察者间可靠性强度均为优秀，ICC 值为 0.939（0.908-0.963），Kendall's W 值为 0.967。在 4 级中显示出最高的一致性，为 92.50%，在 2 级中最低，为 82.14%。所有分歧都在一个等级差异内。此外，观察者内可靠性也很好，加权 kappa 值范围为 0.904 至 0.954。
这种新的 MRU-UUTD 分级系统具有良好的观察者间和观察者内可靠性，为更广泛的临床应用提供了充分的证据。
