Table 1.

Clinicopathologic characteristics

OverallKTBBBD controlsBBD cases
N = 258n = 86n = 86n = 86
Age
 <4548 (18.6%)16 (18.6%)16 (18.6%)16 (18.6%)
 45–5596 (37.2%)35 (40.7%)30 (34.9%)31 (36.0%)
 >55114 (44.2%)35 (40.7%)40 (46.5%)39 (45.3%)
BMI
 Not available8053
 <2586 (34.4%)24 (27.9%)32 (39.5%)30 (36.1%)
 25–2988 (35.2%)30 (34.9%)25 (30.9%)33 (39.8%)
 ≥3076 (30.4%)32 (37.2%)24 (29.6%)20 (24.1%)
Lobular involution
 Not available12318
 None36 (14.6%)4 (4.8%)12 (14.1%)20 (25.6%)
 Partial114 (46.3%)35 (42.2%)37 (43.5%)42 (53.8%)
 Complete96 (39.0%)44 (53.0%)36 (42.4%)16 (20.5%)
Histologic impression
 Not available2200
 No histologic abnormality54 (21.1%)54 (64.3%)00
 Nonproliferative disease79 (30.9%)22 (26.2%)34 (39.5%)23 (26.7%)
 Proliferative disease without atypia87 (34.0%)7 (8.3%)38 (44.2%)42 (48.8%)
 Atypia36 (14.1%)1 (1.2%)14 (16.3%)21 (24.4%)