State Cancer Profiles

Interpretation of Incidence Rates Data

Incidence Rate Report for California by County

Breast (Late Stage^), 2017-2021

All Races (includes Hispanic), Female, All Ages

Sorted by CI*Rank

Explanation of Column Headers

Objective - The objective of *** is from the Healthy People 2020 project done by the Centers for Disease Control and Prevention.

Incidence Rate (95% Confidence Interval) - The incidence rate is based upon 100,000 people and is an annual rate (or average annual rate) based on the time period indicated. Rates are age-adjusted by 5-year age groups to the 2000 U.S. standard million population.

Percent of Cases with Late Stage - This is the number of late stages cases compared to the number of cases for all stages.

Other Notes

• Larger confidence intervals indicate less stability of the data. This is often due to low counts that are not quite low enough to be suppressed.
• Data is currently being suppressed if there are fewer than 16 counts for the time period.

Line by Line Interpretation of the Report

California³

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Rate : The incidence rate is 41.8 with a 95% confidence interval from 41.4 to 42.2 and 9,240 average annual cases over 2017-2021.
• CI*Rank ⋔ : N/A
• Percent of Cases with Late Stage : 32.7

US (SEER+NPCR)¹

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Rate : The incidence rate is 42.0 with a 95% confidence interval from 41.9 to 42.2 and 80,548 average annual cases over 2017-2021.
• CI*Rank ⋔ : N/A
• Percent of Cases with Late Stage : 31.2

Yolo County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 53.3 with a 95% confidence interval from 47.0 to 60.1 and 56 average annual cases over 2017-2021.
• CI*Rank ⋔ : 1 (1, 17)
• Percent of Cases with Late Stage : 36.1

Mariposa County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 49.1 with a 95% confidence interval from 30.0 to 76.3 and 6 average annual cases over 2017-2021.
• CI*Rank ⋔ : 2 (1, 54)
• Percent of Cases with Late Stage : 32.3

Humboldt County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 49.1 with a 95% confidence interval from 42.2 to 56.9 and 41 average annual cases over 2017-2021.
• CI*Rank ⋔ : 3 (1, 39)
• Percent of Cases with Late Stage : 40.6

Napa County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 47.4 with a 95% confidence interval from 40.9 to 54.6 and 42 average annual cases over 2017-2021.
• CI*Rank ⋔ : 4 (1, 42)
• Percent of Cases with Late Stage : 33.9

Amador County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 47.3 with a 95% confidence interval from 34.4 to 63.7 and 13 average annual cases over 2017-2021.
• CI*Rank ⋔ : 5 (1, 52)
• Percent of Cases with Late Stage : 31.0

Santa Cruz County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 47.3 with a 95% confidence interval from 42.4 to 52.6 and 75 average annual cases over 2017-2021.
• CI*Rank ⋔ : 6 (1, 35)
• Percent of Cases with Late Stage : 31.4

Marin County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 47.1 with a 95% confidence interval from 42.4 to 52.2 and 88 average annual cases over 2017-2021.
• CI*Rank ⋔ : 7 (1, 33)
• Percent of Cases with Late Stage : 28.8

Ventura County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 46.9 with a 95% confidence interval from 44.1 to 49.7 and 234 average annual cases over 2017-2021.
• CI*Rank ⋔ : 8 (2, 23)
• Percent of Cases with Late Stage : 32.4

Glenn County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 46.8 with a 95% confidence interval from 32.7 to 65.1 and 8 average annual cases over 2017-2021.
• CI*Rank ⋔ : 9 (1, 53)
• Percent of Cases with Late Stage : 38.8

Solano County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 46.7 with a 95% confidence interval from 43.0 to 50.7 and 127 average annual cases over 2017-2021.
• CI*Rank ⋔ : 10 (2, 30)
• Percent of Cases with Late Stage : 35.3

Lake County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 46.3 with a 95% confidence interval from 37.0 to 57.3 and 21 average annual cases over 2017-2021.
• CI*Rank ⋔ : 11 (1, 49)
• Percent of Cases with Late Stage : 35.8

El Dorado County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 44.9 with a 95% confidence interval from 39.5 to 50.9 and 58 average annual cases over 2017-2021.
• CI*Rank ⋔ : 12 (1, 44)
• Percent of Cases with Late Stage : 31.2

Calaveras County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 44.8 with a 95% confidence interval from 34.1 to 58.1 and 16 average annual cases over 2017-2021.
• CI*Rank ⋔ : 13 (1, 52)
• Percent of Cases with Late Stage : 32.9

Santa Barbara County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 44.7 with a 95% confidence interval from 40.8 to 48.9 and 107 average annual cases over 2017-2021.
• CI*Rank ⋔ : 14 (3, 39)
• Percent of Cases with Late Stage : 29.6

San Diego County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 44.5 with a 95% confidence interval from 43.1 to 45.9 and 804 average annual cases over 2017-2021.
• CI*Rank ⋔ : 15 (7, 26)
• Percent of Cases with Late Stage : 33.1

Tuolumne County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 44.1 with a 95% confidence interval from 34.4 to 56.0 and 19 average annual cases over 2017-2021.
• CI*Rank ⋔ : 16 (1, 51)
• Percent of Cases with Late Stage : 32.5

San Luis Obispo County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 43.8 with a 95% confidence interval from 39.1 to 48.9 and 77 average annual cases over 2017-2021.
• CI*Rank ⋔ : 17 (2, 44)
• Percent of Cases with Late Stage : 28.0

Contra Costa County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 43.5 with a 95% confidence interval from 41.3 to 45.8 and 308 average annual cases over 2017-2021.
• CI*Rank ⋔ : 18 (7, 34)
• Percent of Cases with Late Stage : 31.0

San Bernardino County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 43.3 with a 95% confidence interval from 41.6 to 45.1 and 475 average annual cases over 2017-2021.
• CI*Rank ⋔ : 19 (8, 33)
• Percent of Cases with Late Stage : 36.9

Sonoma County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 43.3 with a 95% confidence interval from 40.0 to 46.8 and 143 average annual cases over 2017-2021.
• CI*Rank ⋔ : 20 (5, 40)
• Percent of Cases with Late Stage : 29.7

Stanislaus County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 43.3 with a 95% confidence interval from 39.9 to 46.9 and 126 average annual cases over 2017-2021.
• CI*Rank ⋔ : 21 (5, 41)
• Percent of Cases with Late Stage : 32.6

Nevada County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 42.5 with a 95% confidence interval from 35.2 to 50.9 and 33 average annual cases over 2017-2021.
• CI*Rank ⋔ : 22 (1, 50)
• Percent of Cases with Late Stage : 29.9

Sacramento County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 42.4 with a 95% confidence interval from 40.5 to 44.4 and 376 average annual cases over 2017-2021.
• CI*Rank ⋔ : 23 (10, 37)
• Percent of Cases with Late Stage : 32.6

Imperial County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 41.9 with a 95% confidence interval from 35.9 to 48.7 and 37 average annual cases over 2017-2021.
• CI*Rank ⋔ : 24 (2, 49)
• Percent of Cases with Late Stage : 40.5

Orange County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 41.9 with a 95% confidence interval from 40.5 to 43.3 and 780 average annual cases over 2017-2021.
• CI*Rank ⋔ : 25 (14, 36)
• Percent of Cases with Late Stage : 30.9

Monterey County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 41.8 with a 95% confidence interval from 38.0 to 45.9 and 94 average annual cases over 2017-2021.
• CI*Rank ⋔ : 26 (6, 46)
• Percent of Cases with Late Stage : 35.6

Los Angeles County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 41.7 with a 95% confidence interval from 40.9 to 42.5 and 2,367 average annual cases over 2017-2021.
• CI*Rank ⋔ : 27 (17, 35)
• Percent of Cases with Late Stage : 34.1

Alameda County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 41.2 with a 95% confidence interval from 39.4 to 43.1 and 394 average annual cases over 2017-2021.
• CI*Rank ⋔ : 28 (14, 41)
• Percent of Cases with Late Stage : 32.2

Butte County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 41.2 with a 95% confidence interval from 35.9 to 47.0 and 51 average annual cases over 2017-2021.
• CI*Rank ⋔ : 29 (3, 49)
• Percent of Cases with Late Stage : 29.1

San Joaquin County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 41.1 with a 95% confidence interval from 38.3 to 44.1 and 165 average annual cases over 2017-2021.
• CI*Rank ⋔ : 30 (10, 44)
• Percent of Cases with Late Stage : 35.7

Santa Clara County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 41.1 with a 95% confidence interval from 39.3 to 42.9 and 435 average annual cases over 2017-2021.
• CI*Rank ⋔ : 31 (15, 41)
• Percent of Cases with Late Stage : 32.6

Placer County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 40.7 with a 95% confidence interval from 37.2 to 44.6 and 107 average annual cases over 2017-2021.
• CI*Rank ⋔ : 32 (9, 47)
• Percent of Cases with Late Stage : 27.8

Tehama County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 40.4 with a 95% confidence interval from 31.8 to 50.8 and 17 average annual cases over 2017-2021.
• CI*Rank ⋔ : 33 (1, 53)
• Percent of Cases with Late Stage : 31.9

Sutter County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 39.9 with a 95% confidence interval from 32.7 to 48.4 and 22 average annual cases over 2017-2021.
• CI*Rank ⋔ : 34 (2, 52)
• Percent of Cases with Late Stage : 32.7

Lassen County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 39.4 with a 95% confidence interval from 25.3 to 58.8 and 6 average annual cases over 2017-2021.
• CI*Rank ⋔ : 35 (1, 54)
• Percent of Cases with Late Stage : 31.8

San Benito County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 39.1 with a 95% confidence interval from 30.1 to 50.0 and 13 average annual cases over 2017-2021.
• CI*Rank ⋔ : 36 (1, 53)
• Percent of Cases with Late Stage : 35.7

Merced County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 38.8 with a 95% confidence interval from 34.1 to 44.0 and 50 average annual cases over 2017-2021.
• CI*Rank ⋔ : 37 (9, 51)
• Percent of Cases with Late Stage : 38.2

Shasta County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 38.7 with a 95% confidence interval from 33.4 to 44.7 and 45 average annual cases over 2017-2021.
• CI*Rank ⋔ : 38 (7, 51)
• Percent of Cases with Late Stage : 27.0

Riverside County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 38.7 with a 95% confidence interval from 37.2 to 40.3 and 507 average annual cases over 2017-2021.
• CI*Rank ⋔ : 39 (28, 46)
• Percent of Cases with Late Stage : 32.9

Fresno County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 38.1 with a 95% confidence interval from 35.7 to 40.7 and 186 average annual cases over 2017-2021.
• CI*Rank ⋔ : 40 (24, 48)
• Percent of Cases with Late Stage : 33.2

Inyo County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 38.0 with a 95% confidence interval from 25.0 to 56.8 and 6 average annual cases over 2017-2021.
• CI*Rank ⋔ : 41 (1, 54)
• Percent of Cases with Late Stage : 34.4

San Francisco County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 37.9 with a 95% confidence interval from 35.4 to 40.5 and 184 average annual cases over 2017-2021.
• CI*Rank ⋔ : 42 (25, 49)
• Percent of Cases with Late Stage : 30.0

San Mateo County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 37.6 with a 95% confidence interval from 35.1 to 40.3 and 176 average annual cases over 2017-2021.
• CI*Rank ⋔ : 43 (25, 49)
• Percent of Cases with Late Stage : 26.7

Kern County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 37.5 with a 95% confidence interval from 34.9 to 40.3 and 157 average annual cases over 2017-2021.
• CI*Rank ⋔ : 44 (25, 50)
• Percent of Cases with Late Stage : 34.8

Madera County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 36.6 with a 95% confidence interval from 30.9 to 43.0 and 30 average annual cases over 2017-2021.
• CI*Rank ⋔ : 45 (9, 53)
• Percent of Cases with Late Stage : 35.9

Tulare County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 35.7 with a 95% confidence interval from 32.2 to 39.5 and 79 average annual cases over 2017-2021.
• CI*Rank ⋔ : 46 (26, 52)
• Percent of Cases with Late Stage : 33.7

Mendocino County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 35.6 with a 95% confidence interval from 28.6 to 43.7 and 22 average annual cases over 2017-2021.
• CI*Rank ⋔ : 47 (7, 53)
• Percent of Cases with Late Stage : 30.0

Colusa County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 35.1 with a 95% confidence interval from 20.8 to 55.2 and 4 average annual cases over 2017-2021.
• CI*Rank ⋔ : 48 (1, 54)
• Percent of Cases with Late Stage : 31.1

Del Norte County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 32.8 with a 95% confidence interval from 20.3 to 50.4 and 5 average annual cases over 2017-2021.
• CI*Rank ⋔ : 49 (1, 54)
• Percent of Cases with Late Stage : 46.3

Yuba County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 31.1 with a 95% confidence interval from 23.6 to 40.2 and 12 average annual cases over 2017-2021.
• CI*Rank ⋔ : 50 (15, 54)
• Percent of Cases with Late Stage : 30.8

Kings County⁷

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 29.1 with a 95% confidence interval from 23.3 to 35.9 and 18 average annual cases over 2017-2021.
• CI*Rank ⋔ : 51 (35, 54)
• Percent of Cases with Late Stage : 27.6

Siskiyou County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 28.3 with a 95% confidence interval from 19.3 to 40.2 and 8 average annual cases over 2017-2021.
• CI*Rank ⋔ : 52 (12, 54)
• Percent of Cases with Late Stage : 23.2

Trinity County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 27.9 with a 95% confidence interval from 15.1 to 49.1 and 3 average annual cases over 2017-2021.
• CI*Rank ⋔ : 53 (2, 54)
• Percent of Cases with Late Stage : 37.8

Plumas County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 26.8 with a 95% confidence interval from 15.6 to 44.3 and 5 average annual cases over 2017-2021.
• CI*Rank ⋔ : 54 (4, 54)
• Percent of Cases with Late Stage : 27.9

Alpine County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : * Data has been suppressed to ensure confidentiality and stability of rate estimates. Counts are suppressed if fewer than 16 records were reported in a specific area-sex-race category. If an average count of 3 is shown, the total number of cases for the time period is 16 or more which exceeds suppression threshold (but is rounded to 3).
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Modoc County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : * Data has been suppressed to ensure confidentiality and stability of rate estimates. Counts are suppressed if fewer than 16 records were reported in a specific area-sex-race category. If an average count of 3 is shown, the total number of cases for the time period is 16 or more which exceeds suppression threshold (but is rounded to 3).
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Mono County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : * Data has been suppressed to ensure confidentiality and stability of rate estimates. Counts are suppressed if fewer than 16 records were reported in a specific area-sex-race category. If an average count of 3 is shown, the total number of cases for the time period is 16 or more which exceeds suppression threshold (but is rounded to 3).
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Sierra County⁷

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : * Data has been suppressed to ensure confidentiality and stability of rate estimates. Counts are suppressed if fewer than 16 records were reported in a specific area-sex-race category. If an average count of 3 is shown, the total number of cases for the time period is 16 or more which exceeds suppression threshold (but is rounded to 3).
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Notes:
Created by statecancerprofiles.cancer.gov on 12/14/2024 11:40 am.

State Cancer Registries may provide more current or more local data.

† Incidence rates (cases per 100,000 population per year) are age-adjusted to the 2000 US standard population (19 age groups: <1, 1-4, 5-9, ... , 80-84, 85+). Rates are for invasive cancer only (except for bladder cancer which is invasive and in situ) or unless otherwise specified. Rates calculated using SEER*Stat. Population counts for denominators are based on Census populations as modified by NCI. The US Population Data File is used for SEER and NPCR incidence rates.

Rates are computed using cancers classified as malignant based on ICD-O-3. For more information see malignant.html.

^ Late Stage is defined as cases determined to be regional or distant. Due to changes in stage coding, Combined Summary Stage (2004+) is used for data from Surveillance, Epidemiology, and End Results (SEER) databases and Merged Summary Stage is used for data from National Program of Cancer Registries databases. Due to the increased complexity with staging, other staging variables maybe used if necessary.
⋔ Results presented with the CI*Rank statistics help show the usefulness of ranks. For example, ranks for relatively rare diseases or less populated areas may be essentially meaningless because of their large variability, but ranks for more common diseases in densely populated regions can be very useful. More information about methodology can be found on the CI*Rank website.

Φ Rural-Urban Continuum Codes provided by the USDA.
* Data has been suppressed to ensure confidentiality and stability of rate estimates. Counts are suppressed if fewer than 16 records were reported in a specific area-sex-race category. If an average count of 3 is shown, the total number of cases for the time period is 16 or more which exceeds suppression threshold (but is rounded to 3).
¹ Source: National Program of Cancer Registries and Surveillance, Epidemiology, and End Results SEER*Stat Database - United States Department of Health and Human Services, Centers for Disease Control and Prevention and National Cancer Institute. Based on the 2023 submission.
³ Source: SEER November 2023 submission. State Cancer Registry also receives funding from CDC's National Program of Cancer Registries.
⁷ Source: SEER November 2023 submission.

Data for the United States does not include data from Indiana.
Data for the United States does not include Puerto Rico.