Table 1.
Descriptive covariates of study population, stratified by ethnicity and case–control status, Breast Cancer Health Disparities Study (n = 7,733)
| Characteristic | Study populationa (n = 7,733) |
pc | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Non-hispanic white(n = 3,030) |
Hispanic/Native American (n= 4,703) |
||||||||||
| Controls (n = 1,599) |
Cases (n = 1,431) |
pb | Controls (n = 2,610) |
Cases (n = 2,093) |
pb | ||||||
| N | (%) | N | (%) | N | (%) | N | (%) | ||||
| Age (years) | 0.04 | 0.22 | |||||||||
| <40 | 87 | 6.1 | 117 | 7.3 | 313 | 12.0 | 198 | 9.5 | <0.0001 | ||
| 40–49 | 401 | 28.0 | 409 | 25.6 | 834 | 31.9 | 708 | 33.8 | |||
| 50–59 | 403 | 28.2 | 410 | 25.6 | 758 | 29.0 | 614 | 29.3 | |||
| 60–69 | 340 | 23.8 | 356 | 22.3 | 530 | 20.3 | 425 | 20.3 | |||
| 70+ | 200 | 13.9 | 307 | 19.2 | 175 | 6.7 | 148 | 7.1 | |||
| Study | 0.37 | 0.94 | |||||||||
| 4-CBCS | 1,335 | 83.5 | 1,177 | 82.3 | 736 | 28.2 | 579 | 27.7 | <0.0001 | ||
| Mexico | – | – | – | – | 994 | 38.1 | 816 | 39.0 | |||
| San Francisco | 264 | 16.5 | 254 | 17.8 | 880 | 33.7 | 698 | 33.4 | |||
| % Native american ancestry | 0.21 | 0.0012 | |||||||||
| ≤0.28 | 1,591 | 99.5 | 1,420 | 99.2 | 280 | 10.7 | 276 | 13.2 | <0.0001 | ||
| 0.28–0.70 | 7 | 0.44 | 7 | 0.5 | 1,697 | 65.0 | 1,373 | 65.6 | |||
| >0.70 | 1 | 0.1 | 4 | 0.3 | 633 | 24.3 | 444 | 21.2 | |||
| Menopausal status | 0.13 | 0.71 | |||||||||
| pre-/peri- | 494 | 31.5 | 475 | 34.1 | 1,027 | 40.7 | 831 | 41.2 | <0.0001 | ||
| post- | 1,075 | 68.5 | 919 | 65.9 | 1,499 | 59.3 | 1,186 | 58.8 | |||
| Education | 0.57 | \0.0001 | |||||||||
| <High school | 79 | 5.0 | 71 | 5.0 | 1538 | 60.2 | 1088 | 52.8 | <0.0001 | ||
| High school grad/GED | 338 | 21.3 | 284 | 20.1 | 419 | 16.4 | 377 | 18.3 | |||
| Post-high school | 1,168 | 73.7 | 1,059 | 74.9 | 597 | 23.4 | 594 | 28.9 | |||
| ER/PR status | |||||||||||
| ER+/PR+ | – | – | 681 | 68.4 | – | – | – | 598 | 61.8 | – | 0.001 |
| ER+/PR− | – | – | 116 | 11.7 | – | – | 117 | 12.1 | |||
| ER−/PR+ | – | – | 17 | 1.7 | – | – | 28 | 2.9 | |||
| ER−/PR− | – | – | 181 | 18.2 | – | – | 225 | 23.2 | |||
a
Column percentages may not add up to 100 % due to rounding. Column totals (n) may not add up to total for each column due to missing observations: education (n = 121), menopausal status (n = 227)
b
Case–control status comparisons within each ethnic group, Mantel–Haenszel chi square p values reported
c
Ethnic group comparisons regardless of case–control status, Mantel–Haenszel chi square p values reported