Table 3.
Age-adjusted incidence rates of invasive breast cancer by neighborhood socioeconomic status (SES), Hispanic enclave and stage at diagnosis in Hispanic females (n=12,563), California, 1998–2002: Incidence of breast cancer per 100,000 person-years, age-standardized to the 2000 United States population, with 95% confidence intervals (95% CI).
| Race/ethnicity | Cases (N) | Rate | 95% CI | Rate Ratio* | 95% CI |
|---|---|---|---|---|---|
| SES (quintiles) | |||||
| All stages of diagnosis | |||||
| 1 (lowest) | 3,710 | 66.2 | 64.0–68.5 | Reference | |
| 2 | 3,129 | 80.8 | 77.8–83.8 | 1.22 | 1.16–1.28 |
| 3 | 2,474 | 88.3 | 84.7–92.0 | 1.33 | 1.26–1.41 |
| 4 | 1,899 | 103.1 | 98.4–108.0 | 1.56 | 1.47–1.65 |
| 5 (highest) | 1,351 | 118.8 | 112.3–125.6 | 1.79 | 1.68–1.92 |
| Localized stage at diagnosis | |||||
| 1 (lowest) | 1,743 | 32.3 | 30.7–33.9 | Reference | |
| 2 | 1,635 | 43.4 | 41.2–45.6 | 1.34 | 1.25–1.44 |
| 3 | 1,304 | 48.1 | 45.4–50.9 | 1.49 | 1.38–1.61 |
| 4 | 1,056 | 58.7 | 55.1–62.4 | 1.82 | 1.68–1.97 |
| 5 (highest) | 797 | 71.7 | 66.7–77.1 | 2.22 | 2.03–2.43 |
| Regional/distant stage at diagnosis | |||||
| 1 (lowest) | 1,727 | 29.4 | 28.0–30.9 | Reference | |
| 2 | 1,310 | 32.5 | 30.7–34.4 | 1.10 | 1.02–1.19 |
| 3 | 1,024 | 34.6 | 32.5–36.9 | 1.18 | 1.08–1.28 |
| 4 | 760 | 39.6 | 36.7–42.6 | 1.35 | 1.23–1.47 |
| 5 (highest) | 507 | 42.3 | 38.6–46.3 | 1.44 | 1.29–1.60 |
| Hispanic enclave index (quintile) | |||||
| All stages of diagnosis | |||||
| 1 (highest) | 4,333 | 67.5 | 65.4–69.6 | Reference | |
| 2 | 3,230 | 78.5 | 75.7–81.4 | 1.16 | 1.11–1.22 |
| 3 | 2,264 | 100.2 | 95.9–104.6 | 1.48 | 1.41–1.56 |
| 4 | 1,598 | 105.9 | 100.6–111.5 | 1.57 | 1.48–1.67 |
| 5 (lowest) | 1,138 | 121.0 | 113.8–128.5 | 1.79 | 1.67–1.92 |
| Localized stage at diagnosis | |||||
| 1 (highest) | 2,125 | 34.5 | 32.9–36.0 | Reference | |
| 2 | 1,668 | 41.6 | 39.4–43.7 | 1.21 | 1.13–1.29 |
| 3 | 1,221 | 55.7 | 52.5–59.0 | 1.62 | 1.50–1.74 |
| 4 | 887 | 59.8 | 55.8–64.0 | 1.74 | 1.60–1.88 |
| 5 (lowest) | 634 | 69.6 | 64.1–75.5 | 2.02 | 1.84–2.22 |
| Regional/distant stage at diagnosis | |||||
| 1 (highest) | 1,985 | 29.5 | 28.1–30.9 | Reference | |
| 2 | 1,387 | 32.4 | 30.7–34.3 | 1.10 | 1.02–1.18 |
| 3 | 915 | 38.5 | 35.9–41.2 | 1.31 | 1.20–1.42 |
| 4 | 621 | 39.6 | 36.4–43.0 | 1.34 | 1.22–1.48 |
| 5 (lowest) | 420 | 41.6 | 37.5–45.9 | 1.41 | 1.26–1.58 |
| Combined SES and Hispanic enclave † | |||||
| All stages of diagnosis | |||||
| Low SES, high enclave | 5,948 | 69.5 | 67.7–71.4 | Reference | |
| High SES, low enclave | 4,109 | 108.5 | 105.1–112.0 | 1.56 | 1.50–1.63 |
| Low SES, low enclave | 891 | 96.7 | 90.1–103.5 | 1.39 | 1.29–1.50 |
| High SES, high enclave | 1,615 | 81.2 | 77.2–85.5 | 1.17 | 1.10–1.24 |
| Localized stage at diagnosis | |||||
| Low SES, high enclave | 2,920 | 35.3 | 34.0–36.7 | Reference | |
| High SES, low enclave | 2,284 | 62.0 | 59.4–64.7 | 1.75 | 1.66–1.86 |
| Low SES, low enclave | 458 | 50.8 | 46.0–55.8 | 1.44 | 1.29–1.59 |
| High SES, high enclave | 873 | 45.1 | 42.1–48.3 | 1.28 | 1.18–1.38 |
| Regional/distant stage at diagnosis | |||||
| Low SES, high enclave | 2,691 | 30.1 | 28.9–31.3 | Reference | |
| High SES, low enclave | 1,610 | 40.3 | 38.3–42.5 | 1.34 | 1.25–1.43 |
| Low SES, low enclave | 346 | 35.9 | 32.0–40.0 | 1.19 | 1.05–1.34 |
| High SES, high enclave | 681 | 32.8 | 30.3–35.5 | 1.09 | 1.00–1.19 |
*
Ratio of the incidence rate in US-born to the incidence rate in foreign-born.
†
Low SES includes quintiles 1 and 2; high SES includes quintiles 3, 4 and 5; low enclave includes quintiles 3, 4 and 5; high enclave includes quintiles 1 and 2.