Table 2 Characteristics of antidepressant users and nonusers among controls
From: Use of antidepressant medications in relation to the incidence of breast cancer
Antidepressant users ( N =3426) | Nonusers ( N =10970) | |||
|---|---|---|---|---|
n | % | n | % | |
Age at reference date | ||||
30–39 | 70 | 2.0 | 437 | 4.0 |
40–49 | 635 | 18.5 | 2243 | 20.5 |
50–59 | 910 | 26.6 | 2644 | 24.1 |
60–69 | 845 | 24.7 | 2801 | 25.5 |
70+ | 966 | 28.2 | 2845 | 25.9 |
Length of enrollment | ||||
4–9 | 745 | 21.8 | 3036 | 27.7 |
10–19 | 1422 | 41.5 | 4478 | 40.8 |
20+ years | 1259 | 36.8 | 3456 | 31.5 |
First degree family history of breast cancer | ||||
Yes | 487 | 15.6 | 1210 | 12.9 |
No | 2638 | 84.4 | 8195 | 87.1 |
Age at menarche | ||||
⩽10 | 218 | 6.8 | 522 | 5.2 |
11–14 | 2653 | 82.2 | 8226 | 82.6 |
15+ | 358 | 11.1 | 1208 | 12.1 |
Parous | ||||
Yes | 2759 | 87.6 | 8278 | 87.5 |
No | 389 | 12.4 | 1179 | 12.5 |
Age at first birth | ||||
<20 | 684 | 24.8 | 1490 | 18.0 |
20–24 | 1229 | 44.6 | 3575 | 43.2 |
25–29 | 581 | 21.0 | 2128 | 25.7 |
30–34 | 189 | 6.9 | 781 | 9.4 |
35+ | 76 | 2.8 | 301 | 3.6 |
Ever use of HRT | ||||
Yes | 1638 | 53.8 | 3714 | 40.5 |
No | 1405 | 46.2 | 5453 | 59.5 |
Duration of use of HRT | ||||
⩾5 years | 923 | 30.8 | 1978 | 21.7 |
<5 years | 673 | 22.4 | 1675 | 18.4 |
None | 1405 | 46.8 | 5453 | 59.9 |
Body mass index | ||||
Normal (<25) | 1359 | 44.2 | 4742 | 51.6 |
Overweight (25–29.9) | 855 | 27.8 | 2681 | 29.2 |
Obese (30+) | 861 | 28.0 | 1770 | 19.3 |
Race | ||||
White | 2502 | 91.3 | 7266 | 88.4 |
Asian | 74 | 2.7 | 494 | 6.0 |
Black | 84 | 3.1 | 267 | 3.3 |
Multi/other | 81 | 3.0 | 194 | 2.4 |
Education | ||||
Less than high school | 221 | 8.0 | 571 | 6.9 |
High school graduate | 683 | 24.6 | 1944 | 23.5 |
Some post secondary | 1004 | 36.1 | 2847 | 34.4 |
College graduate | 398 | 14.3 | 1289 | 15.6 |
Advanced degree/some graduate school | 473 | 17.0 | 1621 | 19.6 |
Previous biopsy | ||||
Yes | 592 | 18.9 | 1564 | 16.6 |
No | 2547 | 81.1 | 7859 | 83.4 |
At least 1 screening mammogram within 2 years prior to reference date | ||||
Yes | 2175 | 63.5 | 6195 | 56.5 |
No | 1251 | 36.5 | 4775 | 43.5 |
