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. 2013 Aug 30;10(3):122–127. doi: 10.5812/iranjradiol.10708

Table 4. Intraobserver Agreement for BI-RADS Final Categories .

BI-RADS Categories Observer 1 κ value Observer 2 κ value
Category 3 0.76 0.77
Category 4 0.77 0.94
Category 4a 0.59 0.82
Category 4b 0.52 0.71
Category 4c 0.67 0.90
Category 5 0.86 0.94
Overall 0.64 0.83