|
Breast
|
Pregnancy/age at first birth
|
8.0 (7.4-8.6)
|
1152 (1066–1246)
|
| |
(Nullipara or age at first birth ≥ 24 years)
|
| |
Total period of breast feedinga
|
3.1 (3.1-3.2)
|
453 (441–464)
|
|
(Duration of breast feeding ≤ 6 months)
|
| |
Oral contraceptive use (Ever)
|
5.3 (5.1-5.5)
|
763 (732–795)
|
| |
Hormone replacement therapy use (Ever)b
|
0.3 (0.2-0.3)
|
37 (29–44)
|
| |
Total
|
16.7 (15.8-17.6)
|
2404 (2283–2535)
|
|
Ovary
|
Pregnancy (Nulliparous)
|
1.2 (1.2-1.2)
|
24 (24–24)
|
| |
Breast feeding experience (Never)a
|
2.9 (2.8-2.9)
|
55 (55–56)
|
| |
Tubal ligation (No)a
|
24.5 (23.0-26.2)
|
473 (444–504)
|
| |
Oral contraceptive use (Never)
|
53.3 (27.9-100.0d)
|
1027 (537–1927)
|
| |
Total
|
81.9 (55.0-100.0 d)
|
1579 (1059–1927)
|
| | | |
Attributed % of cases
|
| |
% of breast cancer in women
| |
16.7 (15.8-17.6)
|
| |
% of ovary cancer in women
| |
81.9 (55.0-100.0d)
|
