Table 1.

Characteristics of the study population by screening mammogram result, BCSC

Mammogram classification
FP, additional imaging, N = 159,448FP, biopsy, N = 22,892True-negative, N = 2,025,602
CharacteristicN (%)N (%)N (%)
Age, years
 40–4955,505 (34.8)7,577 (33.1)531,206 (26.2)
 50–5951,227 (32.1)7,417 (32.4)661,656 (32.7)
 60–6939,496 (24.8)5,909 (25.8)605,282 (29.9)
 70–7413,220 (8.3)1,989 (8.7)227,458 (11.2)
Race/ethnicity
 White137,051 (86.0)19,063 (83.3)1,680,964 (83.0)
 Black6,646 (4.2)1,413 (6.2)108,256 (5.3)
 Asian, Native Hawaiian, Pacific Islander5,005 (3.1)876 (3.8)86,173 (4.3)
 Hispanic9,946 (6.2)1,405 (6.1)138,578 (6.8)
 American Indian/Alaska Native800 (0.5)135 (0.6)11,631 (0.6)
Menopausal status
 Pre/Peri63,111 (39.6)8,749 (38.2)605,266 (29.9)
 Post96,337 (60.4)14,143 (61.8)1,420,336 (70.1)
Family history of breast cancer
 Yes25,021 (15.7)3,678 (16.1)311,419 (15.4)
 No134,427 (84.3)19,214 (83.9)1,714,183 (84.6)
History of breast biopsy
 Yes38,970 (24.2)6,675 (29.2)425,906 (21.0)
 No120,478 (75.6)16,217 (70.8)1,599,696 (79.0)
BI-RADS breast density
 Almost entirely fat7,004 (4.4)1,193 (5.2)197,148 (9.7)
 Scattered fibroglandular densities65,367 (41.0)9,331 (40.8)919,377 (45.4)
 Heterogeneously dense73,470 (46.1)10,303 (45.0)754,879 (37.3)
 Extremely dense13,607 (8.5)2,065 (9.0)154,198 (7.6)

Abbreviation: FP, false-positive.