|
Characteristics of breast cancer cases and controls. |
||
| Characteristic a |
Cases (N = 323) |
Controls (N = 649) |
|
|
||
| Age (yrs) |
||
| <50 |
21% |
22 % |
| 50–65 |
55 |
56 |
| >65 |
24 |
22 |
| Mean (SEM) |
54.2 (0.7) |
53.3 (0.4) |
| Race |
||
| Caucasian |
91 % |
89 % |
| All Other |
9 |
11 |
| Education |
||
| < 12 yrs |
12 % |
12 % |
| 12 yrs |
53 |
55 |
| > 12 yrs |
31 |
33 |
| Parity |
||
| Nulliparous |
6 % |
4 % |
| First Pregnancy <30 yrs |
83 |
89 |
| First Pregnancy >30 yrs |
11 |
7 (p < 0.05) |
| Family History |
||
| Positive |
29 % |
16 % |
| Negative |
71 |
84 (p < 0.01) |
| Body Mass |
||
| BMI < 22 |
23 % |
21 % |
| BMI 22–28 |
35 |
39 |
| BMI > 28 |
42 |
40 |
| Mean (SEM) |
27.5 (0.9) |
27.1 (0.7) |
| Menopausal Status |
||
| Premenopausal |
41 % |
47 % |
| Postmenopausal |
59 |
53 (p < 0.05) |
| Postmenopausal ERT |
38 |
31 (p < 0.05) |
| Smoking |
||
| Never smoker |
45 % |
40 % |
| Ex-smoker |
38 |
40 |
| Current smoker |
27 |
20 (p < 0.02) |
| Alcohol Intake |
||
| None |
47 % |
45 % |
| 1–2 drinks per week |
36 |
35 |
| > 2 drinks per week |
17 |
20 |
|
a Family History: either breast or ovarian cancer among first or second degree female relatives; ERT = Estrogen Replacement Therapy for two or more years; Body Mass Index = weight (kg)/ht2(m). | ||
Harris et al. BMC Cancer 2006 6:27 doi:10.1186/1471-2407-6-27 |
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