Table 2 |
||
|
The distribution of women in the control group (n = 2167) and patients with breast cancer (n = 1492) according to the reproductive factors. |
||
|
Factors |
women in the control group (n = 2167) |
patients with breast cancer (n = 1492) |
|
|
||
|
Number of children |
||
|
|
||
|
Nullipara |
451 (20.8%) |
241(16.2%) |
|
|
||
|
≥ 1 |
1716 (79.2%) |
1251 (83.8%) |
|
|
||
|
≥ 4 |
353 (16.3%) |
324 (21.7%) |
|
1 |
312 (14.4%) |
238 (12.4%) |
|
2 |
678 (31.3%) |
506 (33.9%) |
|
3 |
373 (17.2%) |
183 (15.8%) |
|
|
||
|
Age at first birth (years) |
||
|
|
||
|
<25 |
1697 (78.3%) |
1158 (77.6%) |
|
|
||
|
25–29 |
353 (16.3%) |
231 (15.5%) |
|
|
||
|
30–34 |
99 (4.6%) |
64 (4.3%) |
|
|
||
|
≥ 35 |
18 (0.8%) |
39 (2.6%) |
|
|
||
|
Breast feeding |
||
|
|
||
|
Never |
35 (1.6%) |
126 (8.5%) |
|
|
||
|
Ever |
2132 (98.4%) |
1366 (91.5%) |
|
|
||
|
Spontaneous abortion |
||
|
|
||
|
Never |
1540 (71.1%) |
1156 (77.5%) |
|
|
||
|
Ever |
627 (28.9%) |
336 (22.5%) |
|
|
||
|
Induced abortion |
||
|
|
||
|
Never |
1237 (57.1%) |
750 (50.3%) |
|
|
||
|
Ever |
930 (42.9%) |
742 (49.7%) |
|
|
||
|
Oral contraceptive use |
||
|
|
||
|
Never |
1565 (72.2%) |
1217 (81.6%) |
|
|
||
|
Ever |
602 (27.8%) |
275 (18.4%) |
|
|
||
|
Hormone replacement therapy |
||
|
|
||
|
Never |
1933 (89.2%) |
1431 (95.9%) |
|
|
||
|
Ever |
234 (10.8%) |
61 (4.1%) |
|
|
||
|
Age at menopause (years) |
||
|
|
||
|
<50 |
1553 (71.7%) |
971 (65.1%) |
|
|
||
|
≥ 50 |
614 (28.3%) |
521 (34.9%) |
|
|
||
|
Ozmen et al. World Journal of Surgical Oncology 2009 7:37 doi:10.1186/1477-7819-7-37 |
||
