. 2018 Sep 22;38(2):172–180. doi: 10.14366/usg.18012

Table 5.

Interobserver agreement for the subcategorization of category 4 in the first year of the MUST-BE trial

Subcategorization of category 4	κ-value^a)
Subcategorization of category 4	BI-RADS categorization	Initially modified categorization	Re-modified categorization
Category 4a	0.320 (0.197-0.472)	0.495 (0.325-0.710)	0.485 (0.366-0.621)
Category 4 b	0.120 (0.014-0.244)	0.183 (0.094-0.316)	0.211 (0.138-0.301)
Category 4c	0.345 (0.124-0.546)	0.412 (0.205-0.612)	0.534 (0.354-0.696)
Overall subcategorization	0.254 (0.141-0.381)	0.366 (0.242-0.524)	0.394 (0.308-0.492)

The numbers in parentheses are 95% confidence intervals.

MUST-BE, Mammography and Ultrasonography Study for Breast Cancer Screening Effectiveness; BI-RADS, Breast Imaging Reporting and Data System.

^a)

Interobserver agreement was evaluated according to the BI-RADS categorization, the initially modified categorization, and the re-modified categorization.