Detection of early gastric cancer using hydro-stomach CT:Blinded vs unblinded analysis
Detection of early gastric cancer using hydro-stomach CT:Blinded vs unblinded analysis作者机构:Department of Radiol-ogy and Center for Imaging Science Samsung Medical Center Sungkyunkwan University School of Medicine
出 版 物:《World Journal of Gastroenterology》 (世界胃肠病学杂志(英文版))
年 卷 期:2011年第17卷第8期
页 面:1051-1057页
核心收录:
学科分类:1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题:CT检测 胃癌 早期 水电 计算机断层扫描 VS 性能差异 危险因素
摘 要:AIM:To evaluate the difference in diagnostic performance of hydro-stomach computed tomography(CT) to detect early gastric cancer(EGC) between blinded and unblinded analysis and to assess independent factors affecting visibility of cancer ***:Two radiologists initially blinded and then unblinded to gastroscopic and surgical-histological findings independently reviewed hydro-stomach CT images of 110 patients with single *** graded the visibility of cancer foci for each of three gastric segments(upper,middle and lower thirds) using a 4-point scale(1:definitely absent,2:probably absent,3:probably present,and 4:definitely present).The sensitivity and specificity for detecting an EGC were *** and interobserver agreements were *** visibility of an EGC was evaluated with regard to tumor size,invasion depth,gastric segments,histological type and gross morphology using univariate and multivariate ***:The respective sensitivities and specificities [reviewer 1:blinded,20%(22/110) and 98%(215/220);unblinded,27%(30/110) and 100%(219/220)/reviewer 2:blinded,19%(21/110) and 98%(216/220);unblinded,25%(27/110) and 98%(215/220)] were not significantly *** intraobserver agreements were good(weighted κ = 0.677 and 0.666),interobserver agreements were fair(blinded,0.371) or moderate(unblinded,0.558).For both univariate and multivariate analyses,the tumor size and invasion depth were statistically significant factors affecting ***:The diagnostic performance of hydrostomach CT to detect an EGC was not significantly different between blinded and unblinded *** tumor size and invasion depth were independent factors for visibility.