Table 2 Characteristics of the Mammography Evaluation Cohort from the Norwegian Women and Cancer Study by mammogram history, 2005-2010
Program* | Outside program | Never | |
|---|---|---|---|
N | 42285 | 6479 | 4599 |
Age in 2005 | N = 42276 | N = 6476 | N = 4440 |
52-55 | 23∙8% | 19∙9% | 25∙9% |
56-59 | 36∙0% | 31∙4% | 24∙6% |
60-64 | 26∙1% | 24∙2% | 19∙3% |
65-69 | 7∙2% | 11∙2% | 8∙5% |
70-74 | 5∙0% | 6∙9% | 8∙1% |
75-79 | 2∙0% | 6∙4% | 13∙7% |
Parity | N = 42285 | N = 6479 | N = 4599 |
none | 7∙4% | 7∙0% | 8∙5% |
1-2 | 52∙0% | 52∙1% | 43∙1% |
3-4 | 36∙7% | 36∙4% | 40∙0% |
5+ | 4∙0% | 4∙5% | 8∙4% |
Age at first birth | N = 38904 | N = 5983 | N = 4170 |
<20 | 12∙0% | 13∙3% | 16∙4% |
20-24 | 50∙6% | 51∙1% | 51∙6% |
25-29 | 27∙9% | 26∙9% | 23∙3% |
30-34 | 7∙1% | 6∙4% | 6∙3% |
35+ | 2∙4% | 2∙3% | 2∙5% |
Body mass index | N = 41054 | N = 6288 | N = 4369 |
<18.5 | 1∙1% | 1∙0% | 2∙2% |
18.5-24,9 | 51∙4% | 51∙4% | 48∙8% |
25-29,9 | 35∙2% | 36∙5% | 35∙1% |
30+ | 12∙2% | 11∙1% | 13∙8% |
Education | N = 40113 | N = 6033 | N = 4159 |
Primary (≤10) | 38∙9% | 41∙0% | 51∙2% |
Secondary (11–12) | 29∙3% | 29∙6% | 23∙8% |
College (≥13) | 31∙8% | 29∙4% | 25∙0% |
Maternal history of breast cancer | 5% | 8% | 3% |
Currently use hormone therapy | 25% | 32% | 12% |