Retrospective Cohort Study
Copyright ©The Author(s) 2022.
World J Radiol. Jan 28, 2022; 14(1): 19-29
Published online Jan 28, 2022. doi: 10.4329/wjr.v14.i1.19
Table 2 Percentage reader agreement with the reference standard for sonographic features
Sonographic feature
RS
R1 pre
R1 post
R2 pre
R2 post
R3 pre
R3 post
Composition
n
n (%)





Spongiform40 (0)1 (25)1 (25)1 (25)3 (75)4 (100)
Cystic or almost completely cystic 113 (27.3)5 (45.5)7 (63.6)8 (72.7)10(90.9)10(90.9)
Mixed cystic and solid 129 (75)6 (50)5 (41.7)7 (58.3)5 (58.3)6 (50)
Solid2726 (96.3)26 (96.3)25 (92.6)26 (96.3)18 (66.7)19 (70.4)
Echogenicity
Anechoic113 (27.3)5 (45.5)5 (45.5)5 (45.5)9 (81.8)8 (72.7)
Hyperechoic or isoechoic2723 (85.2)23 (85.2)19 (70.4)21 (77.8)19 (70.4)20 (74.1)
Hypoechoic122 (16.7)4 (33.3)9 (75)8 (66.7)4 (33.3)4 (33.3)
Shape
Wilder than tall4238 (90.5)39 (92.9)7 (16.7)39 (92.9)41 (97.6)40 (95.2)
Taller than wide87 (87.5)7 (87.5)7 (87.5)7 (87.5)6 (75)4 (50)
Margins
Smooth or ill defined4736 (76.6)35 (74.5)35 (74.5)33 (70.2)43 (91.5)45 (95.7)
Lobulated or irregular31 (33.3)2 (66.7)1 (33.3)2 (66.7)0 (0)0 (0)
Echogenic foci
None or large comet tail artifact4120 (48.8)36 (87.8)29 (70.7)39 (95.1)29 (70.7)29 (70.7)
Macrocalcification31 (33.3)1 (33.3)0 (0)2 (66.7)2 (66.7)2 (66.7)
Punctate echogenic foci65 (83.3)4 (66.7)2 (33.3)5 (83.3)3 (50)3 (50)