Table 2.

Performance of absolute risk models by race or ethnicity^a,b

	White		Black
	AUC (95% CI)	O/E (95% CI)	AUC (95% CI)	O/E (95% CI)
Absolute risk (BCRAT)	0.59 (0.56 to 0.60)	1.25 (0.89 to 1.38)	0.60 (0.56 to 0.64)	1.10 (0.90 to 1.25)
Absolute risk + BI-RADS density	0.59 (0.57 to 0.59)	1.21 (0.88 to 1.30)	0.61 (0.59 to 0.63)	1.10 (0.92 to 1.24)
Absolute risk + dense area	0.59 (0.58 to 0.60)	1.22 (0.95 to 1.30)	0.62 (0.60 to 0.64)	1.02 (0.88 to 1.15)
Absolute risk + percent density	0.59 (0.58 to 0.60)	1.20 (0.90 to 1.28)	0.62 (0.60 to 0.64)	1.10 (0.98 to 1.19)
BI-RADS + dense area	0.59 (0.59 to 0.62)	1.21 (0.91 to 1.29)	0.61 (0.60 to 0.64)	1.10 (0.92 to 1.20)
BI-RADS + percent density	0.60 (0.59 to 0.62)	1.19 (0.91 to 1.29)	0.62 (0.60 to 0.64)	1.12 (0.94 to 1.23)
Absolute risk (BCRAT) + BMI	0.60 (0.59 to 0.61)	1.20 (0.93 to 1.31)	0.61 (0.59 to 0.62)	1.10 (0.98 to 1.19)
Absolute risk + BI-RADS density + BMI	0.60 (0.59 to 0.61)	1.22 (0.95 to 1.30)	0.61 (0.57 to 0.66)	1.09 (0.97 to 1.20)
Absolute risk + dense area + BMI	0.60 (0.59 to 0.61)	1.22 (0.95 to 1.30)	0.62 (0.59 to 0.62)	1.12 (0.94 to 1.23)
Absolute risk + percent density + BMI	0.60 (0.59 to 0.61)	1.19 (0.95 to 1.34)	0.63 (0.59 to 0.64)	1.13 (1.01 to 1.19)
BI-RADS + dense area + BMI	0.60 (0.59 to 0.61)	1.22 (0.95 to 1.30)	0.62 (0.59 to 0.62)	1.15 (0.89 to 1.20)
BI-RADS + percent density + BMI	0.60 (0.59 to 0.61)	1.24 (0.95 to 1.30)	0.62 (0.59 to 0.62)	1.12 (0.94 to 1.23)

^aEach model also included age as a covariate. AUC = area under the curve; BCRAT = Breast Cancer Risk Assessment Tool; BI-RADS = Breast Imaging-Reporting and Data System; BMI = body mass index; O/E = observed to expected ratio.

^b P values for comparisons of AUCs for risk models by race or ethnicity are not statistically significant.