Table 1 Descriptive statistics of TDLU involution measures.
Characteristic | Overall (N = 1398) | Komen Tissue Bank (N = 1089) | BREAST Stamp Project (N = 309) |
|---|---|---|---|
Age (years), n (%) | |||
<30 | 318 (22.7) | 318 (29.2) | 0 |
30–39 | 234 (16.7) | 234 (21.5) | 0 |
40–49 | 431 (30.8) | 274 (25.2) | 157 (50.8) |
50–59 | 301 (21.5) | 186 (17.1) | 115 (37.2) |
≥60 | 114 (8.2) | 77 (7.1) | 37 (12.0) |
Menopausal status, n (%) | |||
Premenopausal | 1,053 (76.4) | 847 (79.2) | 206 (66.7) |
Postmenopausal | 325 (23.6) | 222 (20.8) | 103 (33.3) |
Parity, n (%) | |||
Nulliparous | 581 (41.6) | 507 (46.6) | 74 (23.9) |
Parous | 817 (58.4) | 582 (53.4) | 235 (76.1) |
Family history, n (%) | |||
No | 1,081 (77.6) | 853 (78.3) | 228 (75.0) |
Yes | 312 (22.4) | 236 (21.7) | 76 (25.0) |
Observed TDLUs, n (%) | |||
No | 455 (32.5) | 369 (33.9) | 86 (27.8) |
Yes | 943 (67.5) | 720 (66.1) | 223 (72.2) |
TDLU count, median (IQR) | 3 (0–11) | 3 (0–11) | 4 (0–14) |
TDLU/(100 mm2), median (IQR) | 8.5 (0.0–31.0) | 8.4 (0.0–31.8) | 9.7 (0.0–26.7) |
Median acini count per TDLU, median (IQR) | 12 (7–18.5) | 12 (7–19) | 11 (7.1–16.5) |
Median acini count per TDLU (including women with 0 TDLUs), median (IQR) | 7 (0–14.5) | 7 (0–15) | 8 (0–13.5) |
(TDLU counts per unit area) * (acini count/TDLU), median (IQR) | 2.4 (0.8–6.4) | 2.5 (0.9–7.3) | 2.1 (0.6–4.7) |
(TDLU count per unit area) * (acini count/TDLU) (including women with 0 TDLUs), median (IQR) | 0.8 (0–4.2) | 0.8 (0–4.2) | 0.9 (0–3.2) |
