Table 1.
Characteristics of the 2948 women with DCIS treated with breast-conserving surgery*
| Characteristic | No. (%) |
| Age at diagnosis, y | |
| 25–49 | 753 (25.5) |
| 50–59 | 842 (28.6) |
| 60–69 | 790 (26.8) |
| 70–84 | 563 (19.1) |
| Diagnosis year | |
| 1990–1991 | 247 (8.4) |
| 1992–1993 | 347 (11.8) |
| 1994–1995 | 441 (15.0) |
| 1996–1997 | 553 (18.8) |
| 1998–1999 | 655 (22.2) |
| 2000–2001 | 705 (23.9) |
| Race | |
| White | 2015 (68.4) |
| Asian | 353 (12.0) |
| Black | 285 (9.7) |
| Hispanic | 252 (8.5) |
| Other | 7 (0.2) |
| Unknown | 36 (1.2) |
| BMI at diagnosis, kg/m2 | |
| <25 (normal) | 1107 (37.6) |
| 25–29 (overweight) | 900 (30.5) |
| ≥30 (obese) | 647 (21.9) |
| Unknown | 294 (10.0) |
| Menopausal status at diagnosis | |
| Postmenopausal | 2033 (69.0) |
| Pre/perimenopausal | 849 (28.8) |
| Unknown | 66 (2.2) |
| Diabetes at diagnosis | |
| Yes | 213 (7.2) |
| No | 2729 (92.6) |
| Unknown | 6 (0.2) |
| Family history of breast cancer at diagnosis | |
| Yes | 518 (17.6) |
| No | 2362 (80.1) |
| Unknown | 68 (2.3) |
| Menopausal hormone therapy use at diagnosis | |
| Former | 1230 (41.7) |
| Current | 635 (21.5) |
| Never | 839 (28.5) |
| Unknown | 244 (8.3) |
| Treatment of DCIS | |
| Breast-conserving surgery alone | 1247 (42.3) |
| Breast-conserving surgery/radiation | 1243 (42.2) |
| Breast-conserving surgery/radiation/tamoxifen | 328 (11.1) |
| Breast-conserving surgery/tamoxifen | 130 (4.4) |
*
N = 2948; BMI = body mass index; DCIS = ductal carcinoma in situ.