Cited 9 times in

56 3

Interobserver variability and diagnostic performance in US assessment of thyroid nodule according to size

Authors
 S. J. Park ; S. H. Park ; J. Y. Kwak ; H. J. Moon ; E.-K. Kim ; J. H. Yoon ; H. S. Lee ; E. J. Son ; D. W. Kim ; Y. J. Choi 
Citation
 Ultraschall in der Medizin, Vol.33(7) : E186~E190, 2012 
Journal Title
 Ultraschall in der Medizin 
ISSN
 0172-4614 
Issue Date
2012
Abstract
PURPOSE: To evaluate the interobserver variability for US assessments of thyroid nodules and analyze the diagnostic performances of US assessments in thyroid nodules according to nodule size. MATERIALS AND METHODS: This was an IRB-approved retrospective study with waiver of informed consent. A total of 400 surgically-confirmed thyroid nodules were included. Nodules were divided into 4 groups by size; group 1 (nodule size < 5 mm), group 2 (5 mm ≤ nodule size < 10 mm), group 3 (10 mm ≤ nodule size < 20 mm), and group 4 (nodule size ≥ 20 mm). Three experienced (7 - 10 years) radiologists retrospectively reviewed the US images. Agreement of each US descriptor and final US assessment, and diagnostic performances were calculated in each group and compared. RESULTS: Composition represented substantial or good agreement (k = 0.719 - 0.89). Margin showed the lowest agreement (k = 0.322 - 0.365). Individual kappa values for final assessment according to nodule size were as follows: group 1 (k = 0.674), group 2 (k = 0.596), group 3 (k = 0.674), and group 4 (k = 0.673). Specificity, PPV, and accuracy were significantly different among the groups with different size (p value < 0.05) and lowest in group 1. NPV, specificity, PPV and accuracy except PPV of observer 3 increased with nodule size (p < 0.05). CONCLUSION: Interobserver agreements were relatively good (k = 0.637) in final US assessment regardless of nodule size in experienced radiologists. High false-positive rate was observed in US assessment in nodules less than 5 mm in maximum diameter.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/91991
DOI
10.1055/s-0032-1325404
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Yonsei Biomedical Research Center
1. 연구논문 > 1. College of Medicine > Dept. of Radiology
Yonsei Authors
사서에게 알리기
  feedback
Link
 https://www.thieme-connect.com/DOI/DOI?10.1055/s-0032-1325404
Export
RIS (EndNote)
XLS (Excel)
XML

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse