Table 2.

Age-adjusted incidence rates of invasive breast cancer by nativity in non-Hispanic (N-H) white and Hispanic women, California, 1988–2004: 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
N-H White†	212,087	125.7	125.1–126.2
Hispanic‡	35,134	78.3	77.4–79.1
Foreign-born	18,033	68.2	67.2–69.3	reference	--
US-born	17,101	93.8	92.4–95.3	1.38	1.35–1.41
Stage at diagnosis
Localized
Foreign-born	9,010	35.7	35.0–36.5	reference
US-born	9,340	52.0	50.9–53.1	1.45	1.41–1.50
Regional/Distant
Foreign-born	8,077	28.8	28.1–29.5	reference
US-born	6,944	37.0	36.1–37.9	1.29	1.24–1.33
Unknown
Foreign-born	946	3.7	3.4–4.0	reference
US-born	817	4.8	4.5–5.2	1.30	1.18–1.44

^*Ratio of the incidence rate in US-born to the incidence rate in foreign-born.

^†N-H White population was 142,863,244.

^‡Foreign-born Hispanic population was 34,259,869; US-born Hispanic population was 45,755,983.