Table 2.
Characteristics of the study population
| Characteristic | Cases (N = 209,929) | Controls (N = 200,000) |
|---|---|---|
|
| ||
| Age in years (mean) | 76 | 76 |
|
| ||
| Year of diagnosis (mean) | 2003 | 2003 |
|
| ||
| Duration of coverage in months (mean) | 66 | 66 |
|
| ||
| SEER regiona (%) | ||
| Western | 45.2 | 45.4 |
| Northeastern | 19.0 | 18.2 |
| North-central | 17.4 | 17.5 |
| Southern | 18.4 | 19.0 |
|
| ||
| Race/ethnicity (%) | ||
| White | 87.3 | 83.2 |
| Black | 7.5 | 8.0 |
| Mixed | 1.6 | 2.1 |
| Asian | 2.1 | 3.8 |
| Hispanic | 1.2 | 2.2 |
| North American Indian | 0.2 | 0.4 |
| Other/Unknown | 0.2 | 0.2 |
|
| ||
| Mammogram between 1 and 4 years before diagnosis (%) | 35.2 | 34.5 |
|
| ||
| Dyslipidemia (%) | 51.2 | 50.9 |
|
| ||
| Diabetes (%) | 22.2 | 22.4 |
a
Western (San Francisco, Hawaii, New Mexico, Seattle, Utah, San Jose, Los Angeles, greater California), Northeastern (Connecticut, New Jersey), North-central (Detroit, Iowa), and Southern (Atlanta, rural Georgia, Kentucky, Louisiana, greater Georgia).