|
Odds ratios (OR) with 95% confidence intervals (CI) for breast cancer related to the use of oral contraceptives (OCs) while customer of the HSHS or before that. |
|||||||
| OC user |
Cases |
Controls |
Crude |
Adjusted* |
|||
| n |
% |
n |
% |
OR |
OR |
95% CI |
|
|
|
|||||||
| No † |
15 |
10 |
57 |
18 |
1 |
1 |
|
| Yes |
114 |
76 |
222 |
70 |
2.1 |
2.1 |
(1.1, 4.2) |
| Not recorded |
21 |
14 |
37 |
12 |
1.9 |
1.6 |
(0.6, 4.0) |
| Total |
150 |
100 |
316 |
100 |
|||
|
*Adjusted for parity and age at delivery (no births before year of case's diagnosis, birth before 25 years, other), sports (no sports, sports, unknown), and smoking (never, ever, unknown). † Reference group. | |||||||
Hemminki et al. BMC Women's Health 2002 2:9 doi:10.1186/1472-6874-2-9 |
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