Impact of intercensal population projections and error of closure on breast cancer surveillance: examples from 10 California counties

Table 2 DOF-based versus census-based breast cancer incidence rates among non-Hispanic white women (1999–2001)

County	Average cases per year	DOF-based incidence rate (95% CI)^a	Census-based incidence rate (95% CI)^a	Standardized rate ratio
Alameda	575	143.3 (136.6–150.4)	151.8 (144.6–159.2)	0.94
Contra Costa	592	158.0 (150.7–165.7)	164.9 (157.2–172.9)	0.96
Marin	245	213.6 (198.4–229.9)	175.8 (163.2–189.5)	1.22^b
San Francisco	296	140.3 (131.0–150.7)	159.8 (149.2–171.0)	0.88
San Mateo	406	152.3 (143.7–161.4)	163.4 (154.2–173.2)	0.93
Monterey	172	152.7 (139.7–166.9)	150.7 (137.7–164.8)	1.01
San Benito	19	114.0 (85.9–149.0)	138.7 (104.6–182.0)	0.82
Santa Clara	743	143.4 (137.5–149.5)	158.6 (152.0–165.4)	0.90
Santa Cruz	161	148.2 (135.1–162.4)	157.8 (143.8–173.0)	0.94^b
Los Angeles	3587	153.8 (150.7–156.9)	161.0 (157.8–164.3)	0.96^b

^aIncidence rates are expressed per 100,000 women based on year 2000 population denominators. Data are adjusted to the 2000 US standard. ^bp < 0.05. DOF, Department of Finance.

ISSN: 1465-542X