Table 2.

Mammogram screening history, knowledge of dense breasts, and distribution of BI-RADS breast density

Mammogram screening and breast density	N (%)
Number of mammogram screening prior to interview
1–2	89 (23%)
3–5	113 (30%)
6–10	116 (31%)
11–15	39 (10%)
16–20	23 (6%)
Time interval between interview and most recent mammogram
Same year	290 (76%)
1 year	59 (16%)
2 years	16 (4%)
3 years or more	15 (4%)
BI-RADS density (in the most recent mammogram)
1	25 (7%)
2	138 (36%)
3	189 (50%)
4	28 (7%)
Ever informed by a physician of having dense breasts
Never or don’t know what dense breast means	331 (87%)
Ever informed by a physician of having dense breasts	49 (13%)
Among women with dense breasts in most recent mammogram (n=217)§
Never or don’t know what dense breast means	177 (82%)
Ever informed by a physician of having dense breasts	40 (18%)
Among women informed by a physician of having dense breasts (n=49)
Having dense breasts influenced study participation	10 (20%)

^§Dense breast was defined as BI-RADS category 3 (heterogeneously dense) or 4 (extremely dense).