Table 2. Intra-reader agreement of dichotomic and categorical variables included in the semiquantitative score for assessing breast arterial calcifications (BAC-SS).

Dichotomic and categorical variables	Linear weighted κ	P value	Raw concordance
BAC presence/absence	0.968	<0.001	99%
BAC bilaterality	0.846	<0.001	95%
Vessel opacification (Ov)	0.961	<0.001	99%
Length of calcified vessels (L)	0.912	<0.001	87%

Dichotomic and categorical variables were analyzed with Cohen’s κ statistics. BAC, breast arterial calcifications.