The agreement chart

Table 3 Cross-tabulations of numbers of mammograms according to risk categories for breast cancer, comparing concordance among scales of mammographic density patterns - [Garrido-Estepa et al. 2010]

		(A) Wolfe classification scale						(B) Tabár classification scale
		Second measure						Second measure
		N1	P1	P2	DY	Total		II	III	IV	V	Total
First measure	N1	12	9	0	0	21	II	12	9	0	0	21
	P1	4	139	13	5	161	III	4	170	16	8	198
	P2	0	7	101	14	122	IV	0	4	114	6	124
	DY	0	2	13	56	71	V	0	8	9	15	32
	Total	16	157	127	75	375	Total	16	191	139	29	375
		(C) BI-RADS classification scale					(D) Boyd classification scale
		Second measure						Second measure
		AEF	SFD	HD	ED	Total		A	B	C	D	E	F	Total
First measure	AEF	147	13	0	0	160	A	6	4	0	0	0	0	10
	SFD	14	101	10	0	125	B	4	56	11	0	0	0	71
	HD	0	14	48	6	68	C	0	16	50	13	0	0	79
	ED	0	0	3	19	22	D	0	0	14	102	9	0	125
	Total	161	128	61	25	375	E	0	0	0	14	48	6	68
							F	0	0	0	0	3	19	22
							Total	10	76	75	129	60	25	375

(A) Wolfe:
Low-risk categories:
N1: Breast composed almost completely of fat, with perhaps just a few fibrous connective tissue strands.
P1: Breast composed mainly of fat, although up to a quarter of the sub-areolar area may show beaded or cord-like areas corresponding to prominent ducts.
High risk categories:
P2: More severe involvement of the breast, with a prominent duct pattern occupying more than one quarter of breast volume.
DY: Breast typically contains extensive regions of homogeneous mammographic densities, which appear as sheet-like regions. The proportion of density is greater than that of the fat.
(B) Tabár:
Low risk categories:
I: Mammogram composed of scalloped contours with some lucent areas of fatty replacement and 1 mm evenly distributed nodular densities.
II: Mammogram composed almost entirely of lucent areas of fatty replacement and 1-mm evenly distributed nodular densities.
III: Prominent ducts in the retroareolar area.
High risk categories:
IV: Extensive, nodular and linear densities with nodular size larger than normal lobules.
V: Homogeneous ground-glass-like appearance with no perceptible features.
(C) BI-RADS:
Low risk categories:
Almost entirely fat: 0-25%.
Scattered fibroglandular densities: > 25-50%.
High risk categories:
Heterogeneously dense: > 50-75%.
Extremely dense: > 75%.
(D) Boyd:
Low risk categories:
A: 0%.
B: > 0-10*%.
C: 10-25*%.
D: 25-50*%.
High risk categories:
E: 50-75*%.
F: ≥75%.
*Upper bound excluded.

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