Table 1.
Select characteristics of subjects from the Susan G. Komen Tissue Bank, by menopausal status (n = 1938)
| Characteristic | Premenopausal (n = 1369) | Postmenopausal (n = 569) |
|---|---|---|
| No. (%)* | No. (%)* | |
| Age, y | ||
| <30 | 452 (33.0) | 0 (0) |
| 30–39 | 410 (29.9) | 15 (2.6) |
| 40–49 | 395 (28.9) | 68 (12) |
| 50–59 | 112 (8.2) | 264 (46.4) |
| 60–75 | 0 (0) | 222 (39) |
| Race/ethnicity | ||
| Non-Hispanic Caucasian | 965 (70.5) | 414 (72.8) |
| African American | 249 (18.2) | 117 (20.6) |
| Asian | 25 (1.8) | 22 (3.9) |
| Hispanic | 107 (7.8) | 16 (2.8) |
| Other/missing | 23 (1.7) | 0 (0) |
| Education | ||
| High school/GED or less | 291 (21.3) | 95 (16.7) |
| Vocational/tech school or associates degree | 188 (13.7) | 106 (18.6) |
| College degree | 512 (37.4) | 148 (26.0) |
| Graduate/professional degree | 296 (21.6) | 163 (28.6) |
| Smoking | ||
| Never | 1,039 (75.9) | 358 (62.9) |
| Former | 217 (15.9) | 168 (29.5) |
| Current | 89 (6.5) | 32 (5.6) |
| Body mass index, kg/m2 | ||
| <25 | 522 (38.1) | 151 (26.5) |
| 25–29 | 360 (26.3) | 187 (32.9) |
| ≥30 | 484 (35.4) | 228 (40.1) |
| Age at menarche, y | ||
| ≤12 | 702 (51.3) | 276 (48.5) |
| 13 | 366 (26.7) | 154 (27.1) |
| ≥14 | 300 (21.9) | 138 (24.3) |
| Current hormonal birth control use | ||
| No | 936 (68.4) | |
| Yes | 433 (31.6) | |
| Parity | ||
| Nulliparous | 698 (51.0) | 108 (19.0) |
| Parous | 671 (49.0) | 461 (81.0) |
| Number of live births | ||
| 1 | 183 (27.3) | 90 (19.5) |
| 2 | 312 (46.5) | 214 (46.4) |
| ≥3 | 176 (26.2) | 157 (34.1) |
| Age at first full-term birth, y | ||
| <25 | 269 (40.1) | 226 (49.0) |
| 25–29 | 215 (32.0) | 137 (29.7) |
| ≥30 | 185 (27.6) | 94 (20.4) |
| Breastfeeding | ||
| Never | 138 (20.6) | 150 (32.5) |
| Ever | 533 (79.4) | 310 (67.2) |
| Bilateral oophorectomy | ||
| No | 440 (77.3) | |
| Yes | 129 (22.7) | |
| Menopausal hormone therapy | ||
| Nonuser | 288 (50.6) | |
| Current user | 85 (14.9) | |
| Former user | 181 (31.8) | |
| Years since menopause | ||
| <5 | 126 (22.1) | |
| 5–10 | 93 (16.3) | |
| 11–15 | 78 (13.7) | |
| >15 | 59 (10.4) | |
| Gynecologic surgery | 211 (37.1) | |
| Number of first degree relatives with breast cancer | ||
| 0 | 1,123 (82.0) | 427 (75.0) |
| 1 | 218 (15.9) | 108 (19.0) |
| ≥2 | 28 (2.0) | 34 (6.0) |
| Ever had a breast biopsy | ||
| Never | 1,225 (89.5) | 410 (72.1) |
| Yes, 1 | 105 (7.7) | 116 (20.4) |
| Yes, ≥2 | 25 (1.8) | 39 (6.9) |
| H&E percent fat, % | ||
| 0–25 | 155 (11.3) | 18 (3.2) |
| 26–50 | 143 (10.4) | 36 (6.3) |
| 51–75 | 282 (20.6) | 88 (15.5) |
| 76–100 | 789 (57.6) | 427 (75.0) |
* Percentages might not total to 100 because of missingness.