Table 3 Prevalence of breast cancer risk factors in non-Hispanic white women 35 to 74 years of age
Patient characteristics | Population-based control series (1989–1999) | California Health Interview Survey | |||
|---|---|---|---|---|---|
| Â | SFBA (n = 1,168) | 2001 | 2003 | ||
| Â | Â | SFBA | Californiaa | SFBA | Californiaa |
Education | Â | Â | Â | Â | Â |
   Some high school or less | 3.2 (2.2–4.2) | 2.3 (1.2–3.3) | 7.5 (6.7–8.3) | 2.9 (1.5–4.4) | 6.2 (5.4–7.0) |
   High school graduate | 20.7 (17.9–23.4) | 18.1 (16.0–20.2) | 23.3 (22.4–24.3) | 15.4 (13.3–17.5) | 23.8 (22.6–25.0) |
   Some college | 27.7 (24.5–30.9) | 27.0 (24.6–29.3) | 34.4 (33.3–35.5) | 25.1 (22.6–27.7) | 34.3 (33.1–35.6) |
   College graduate or higher | 46.7 (42.5–50.9) | 52.7 (50.0–55.3) | 34.8 (33.7–35.9) | 56.5 (53.6–59.4) | 35.6 (34.3–36.9) |
   Missing | 1.6 |  |  |  |  |
Body mass index <25 in women <50 years | 64.4 (56.6–72.1) | 64.1 (60.4–67.7) | 58.0 (56.2–59.7) | 63.9 (59.7–68.1) | 57.2 (55.1–59.3) |
Body mass index ≥ 30 in women ≥ 50 years | 20.9 (17.5–24.2) | 21.7 (18.5–24.8) | 21.5 (20.2–22.9) | 21.1 (17.7–24.5) | 22.9 (21.4–24.4) |
History of breast cancer in mother, sister, or daughter | 13.9 (11.6–16.1) | b | b | b | b |
Ever had a breast biopsy that was not cancer | 11.7 (9.8–13.5) | b | b | b | b |
Ever had radiation treatment to the chest | 2.0 (1.2–2.7) | b | b | b | b |
No vigorous/moderate physical activity in past 30 days | b | 19.8 (17.7–22.0) | 23.4 (22.4–24.4) | b | b |
Drank alcohol in past month | b | 71.3 (68.9–73.8) | 61.3 (60.1–62.4) | 69.8 (67.0–72.7) | 61.0 (59.7–62.3) |
   2+ drinks per dayc |  | 27.6 | 23.6 | 28.0 | 25.9 |
Age at menarche <12 years | 21.0 (18.2–23.8) | 18.5 (16.4–20.6) | 19.4 (18.5–20.4) | b | b |
Age at first live birth ≥ 30 years | 20.7 (17.8–23.7) | 20.4 (18.3–22.5) | 13.4 (12.6–14.2) | b | b |
Number of live births | Â | Â | Â | Â | Â |
   0 | 25.0 (21.9–28.1) | 25.3 (23.2–27.4) | 17.3 (16.5–18.2) | b | b |
   1–2 | 48.2 (43.9–52.6) | 51.4 (48.7–54.0) | 48.0 (46.8–49.2) |  |  |
   ≥3 | 26.7 (23.8–29.7) | 23.3 (21.0–25.6) | 34.7 (33.6–35.8) |  |  |
Hormone therapy use | Â | Â | Â | Â | Â |
   Never | 53.7 (48.8–58.5) | b | b | b | b |
   <5 years | 21.2 (18.6–23.8) |  |  |  |  |
   ≥5 years | 22.8 (20.3–25.3) |  |  |  |  |
   Missing | 2.3 |  |  |  |  |
Ever took hormone supplements for menopause symptoms | b | b | b | 29.8 (26.7–33.0) | 34.5 (32.9–36.0) |
Currently takes hormone supplements for menopause symptoms | b | 34.9 (32.1–37.7) | 37.0 (35.8–38.2) | 16.7 (14.2–19.1) | 21.6 (20.4–22.7) |
   Among women without a hysterectomyd |  | 20.4 | 18.7 | 4.9 | 5.2 |
Mammogram screening history | Â | Â | Â | Â | Â |
   2 years or less | b | 72.9 (70.5–75.2) | 70.4 (69.3–71.5) | 71.0 (68.3–73.7) | 71.6 (70.3–72.8) |
   More than 2 years ago |  | 12.1 (10.4–13.8) | 13.7 (12.9–14.5) | 12.9 (10.9–14.9) | 13.4 (12.5–14.3) |
   Never had a mammogram |  | 15.1 (13.1–17.0) | 15.9 (15.0–16.8) | 16.1 (13.8–18.3) | 15.0 (14.0–16.1) |