Table 1.
Description of Study Population by Self-reported Race/Ethnicity
| NHW | Hispanic | |||||||
|---|---|---|---|---|---|---|---|---|
|
|
||||||||
| Controls | Cases | Controls | Cases | |||||
|
|
||||||||
| N | % | N | % | N | % | N | % | |
| Total | 1586 | 37.9 | 1481 | 41.2 | 2597 | 62.1 | 2111 | 58.8 |
| Study Site | ||||||||
| 4 Corner’s States | 1322 | 83.4 | 1227 | 82.8 | 723 | 27.8 | 597 | 28.3 |
| Mexico | 0 | 0.0 | 0 | 0.0 | 994 | 38.3 | 816 | 38.7 |
| California | 264 | 16.6 | 254 | 17.2 | 880 | 33.9 | 698 | 33.1 |
| Age (years) | ||||||||
| <40 | 116 | 7.3 | 89 | 6.0 | 311 | 12.0 | 200 | 9.5 |
| 40-49 | 408 | 25.7 | 409 | 27.6 | 831 | 32.0 | 713 | 33.8 |
| 50-59 | 409 | 25.8 | 413 | 27.9 | 756 | 29.1 | 617 | 29.2 |
| 60-69 | 350 | 22.1 | 361 | 24.4 | 526 | 20.3 | 430 | 20.4 |
| 70+ | 303 | 19.1 | 209 | 14.1 | 173 | 6.7 | 151 | 7.2 |
| Mean | 56.6 | 56.0 | 52.3 | 52.7 | ||||
| Menopausal Status | ||||||||
| Pre-menopausal | 494 | 31.5 | 489 | 33.5 | 1027 | 40.7 | 836 | 40.9 |
| Post-menopausal | 1076 | 68.5 | 970 | 66.5 | 1499 | 59.3 | 1210 | 59.1 |
| Estimated Native American Ancestry | ||||||||
| Low (0 - 28%) | 1578 | 99.5 | 1472 | 99.4 | 278 | 10.7 | 275 | 13.0 |
| Intermediate (29 - 70%) | 7 | 0.4 | 7 | 0.5 | 1686 | 64.9 | 1393 | 66.0 |
| High (71 - 100%) | 1 | 0.1 | 2 | 0.1 | 633 | 24.4 | 443 | 21.0 |
| ER/PR Status* | ||||||||
| ER+PR+ | NA | 695 | 68.2 | NA | 605 | 61.9 | ||
| ER+PR− | NA | 121 | 11.9 | NA | 115 | 11.8 | ||
| ER−PR+ | NA | 15 | 1.5 | NA | 28 | 2.9 | ||
| ER−PR− | NA | 188 | 18.4 | NA | 229 | 23.4 | ||
*
Tumor information was unavailable for the Mexico study sites.