Effect of training on resident inter-reader agreement with American College of Radiology Thyroid Imaging Reporting and Data System

Table 1 Pooled inter-reader agreement with the reference standard

	Pre-training, k	Post-training, k	P value of the difference
Composition	0.46 (95%CI: 0.37 to 0.54), moderate	0.52 (95%CI: 0.44 to 0.61), moderate	0.32
Echogenicity	0.36 (95%CI: 0.29 to 0.44), fair	0.44 (95%CI: 0.37 to 0.52), moderate	0.30
Shape	0.09 (95%CI: 0.02 to 0.21), slight	0.67 (95%CI: 0.56 to 0.78), substantial	< 0.001
Margins	0.03 (95%CI: -0.14 to 0.08), slight	0.05 (95%CI: -0.05 to 0.15), slight	0.71
Echogenic Foci	0.28 (95%CI: 0.19 to 0.37), fair	0.45 (95%CI: 0.36 to 0.53), moderate	0.004
TI-RADS Level	0.14 (95%CI: 0.08 to 0.20), slight	0.36 (95%CI: 0.30 to 0.42), fair	< 0.001
Recommendations	0.36 (95%CI: 0.27 to 0.45), fair	0.50 (95%CI: 0.41 to 0.59), moderate	0.02