Table 1.
Selected characteristics of women in the Komen Tissue Bank and BREAST Stamp Project.
| Characteristics | Komen Tissue Bank (N=548) |
BREAST Stamp Project (N=324) |
|---|---|---|
| Age (years), n (%) | ||
| < 30 | 183 (33.4) | 0 |
| 30 to 39 | 102 (18.6) | 0 |
| 40 to 49 | 124 (22.6) | 161 (49.7) |
| 50 to 59 | 86 (15.7) | 124 (38.3) |
| ≥ 60 | 53 ( 9.7) | 39 (12.0) |
| Menopausal Status, n (%) | ||
| Premenopausal | 393 (71.7) | 199 (61.4) |
| Postmenopausal | 155 (28.3) | 125 (38.6) |
| Parity, n (%) | ||
| Nulliparous | 268 (48.9) | 82 (25.3) |
| Parous | 280 (51.1) | 242 (74.7) |
| Family history of breast cancer, n (%) | ||
| No | 421 (76.8) | 240 (75.2) |
| Yes | 127 (23.2) | 79 (24.8) |
| TDLUs observed, n (%) | ||
| No | 170 (31.0) | 87 (26.9) |
| Yes | 378 (69.0) | 237 (73.1) |
| Involution measures, median (IQR) | ||
| TDLU counts per 100mm2 | 22.9 (9.8 – 51.5) | 18.0 (6.4 – 38.0) |
| Median acini count per TDLU | 13.0 (7.5 – 2.5) | 11 (7.0 – 16.5) |
| (TDLU counts)* (acini count per TDLU) | 287.5 (93.9 – 835.8) | 189.7 (48.5 – 477.1) |
TDLU: Terminal duct lobular units; IQR: Interquartile range.