State Cancer Profiles

Interpretation of Incidence Rates Data

Incidence Rate Report for Colorado by County

Breast (Late Stage^), 2018-2022

All Races (includes Hispanic), Female, All Ages

Sorted by Rate

Explanation of Column Headers
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

Colorado²

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Rate : The incidence rate is 43.0 with a 95% confidence interval from 42.0 to 44.1 and 1,382 average annual cases over 2018-2022.
• CI*Rank ⋔ : N/A

US (SEER+NPCR)¹

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Rate : The incidence rate is 42.4 with a 95% confidence interval from 42.3 to 42.5 and 83,714 average annual cases over 2018-2022.
• CI*Rank ⋔ : N/A

Pueblo County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 31.8 with a 95% confidence interval from 27.0 to 37.3 and 34 average annual cases over 2018-2022.
• CI*Rank ⋔ : 33 (21, 33)
• Percent of Cases with Late Stage :

Park County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 32.4 with a 95% confidence interval from 19.0 to 53.8 and 5 average annual cases over 2018-2022.
• CI*Rank ⋔ : 32 (3, 33)
• Percent of Cases with Late Stage :

Garfield County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 34.9 with a 95% confidence interval from 26.1 to 45.7 and 11 average annual cases over 2018-2022.
• CI*Rank ⋔ : 31 (8, 33)
• Percent of Cases with Late Stage :

Eagle County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 35.2 with a 95% confidence interval from 26.0 to 46.8 and 10 average annual cases over 2018-2022.
• CI*Rank ⋔ : 30 (6, 33)
• Percent of Cases with Late Stage :

Mesa County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 37.2 with a 95% confidence interval from 31.8 to 43.3 and 38 average annual cases over 2018-2022.
• CI*Rank ⋔ : 29 (11, 33)
• Percent of Cases with Late Stage :

Archuleta County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 37.8 with a 95% confidence interval from 20.6 to 65.0 and 4 average annual cases over 2018-2022.
• CI*Rank ⋔ : 28 (1, 33)
• Percent of Cases with Late Stage :

Pitkin County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 37.9 with a 95% confidence interval from 22.9 to 60.2 and 4 average annual cases over 2018-2022.
• CI*Rank ⋔ : 27 (1, 33)
• Percent of Cases with Late Stage :

Morgan County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 38.0 with a 95% confidence interval from 25.1 to 55.1 and 6 average annual cases over 2018-2022.
• CI*Rank ⋔ : 26 (2, 33)
• Percent of Cases with Late Stage :

Elbert County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 39.0 with a 95% confidence interval from 26.5 to 56.1 and 7 average annual cases over 2018-2022.
• CI*Rank ⋔ : 25 (2, 33)
• Percent of Cases with Late Stage :

Montezuma County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 39.2 with a 95% confidence interval from 26.2 to 56.6 and 7 average annual cases over 2018-2022.
• CI*Rank ⋔ : 24 (2, 33)
• Percent of Cases with Late Stage :

Logan County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 39.3 with a 95% confidence interval from 23.8 to 61.4 and 5 average annual cases over 2018-2022.
• CI*Rank ⋔ : 23 (1, 33)
• Percent of Cases with Late Stage :

Fremont County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 40.2 with a 95% confidence interval from 29.6 to 53.6 and 12 average annual cases over 2018-2022.
• CI*Rank ⋔ : 22 (3, 33)
• Percent of Cases with Late Stage :

Arapahoe County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 40.7 with a 95% confidence interval from 37.8 to 43.8 and 149 average annual cases over 2018-2022.
• CI*Rank ⋔ : 21 (11, 28)
• Percent of Cases with Late Stage :

Otero County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 41.0 with a 95% confidence interval from 25.8 to 62.4 and 5 average annual cases over 2018-2022.
• CI*Rank ⋔ : 20 (1, 33)
• Percent of Cases with Late Stage :

Broomfield County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 41.8 with a 95% confidence interval from 33.3 to 51.8 and 17 average annual cases over 2018-2022.
• CI*Rank ⋔ : 19 (3, 32)
• Percent of Cases with Late Stage :

Douglas County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 42.5 with a 95% confidence interval from 38.5 to 46.7 and 88 average annual cases over 2018-2022.
• CI*Rank ⋔ : 18 (7, 28)
• Percent of Cases with Late Stage :

Denver County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 42.6 with a 95% confidence interval from 39.5 to 45.8 and 149 average annual cases over 2018-2022.
• CI*Rank ⋔ : 17 (8, 27)
• Percent of Cases with Late Stage :

Jefferson County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 43.4 with a 95% confidence interval from 40.3 to 46.6 and 158 average annual cases over 2018-2022.
• CI*Rank ⋔ : 16 (7, 25)
• Percent of Cases with Late Stage :

Montrose County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 43.5 with a 95% confidence interval from 32.5 to 57.3 and 13 average annual cases over 2018-2022.
• CI*Rank ⋔ : 15 (2, 33)
• Percent of Cases with Late Stage :

Adams County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 44.1 with a 95% confidence interval from 40.4 to 48.0 and 112 average annual cases over 2018-2022.
• CI*Rank ⋔ : 14 (6, 25)
• Percent of Cases with Late Stage :

Weld County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 44.4 with a 95% confidence interval from 39.9 to 49.3 and 74 average annual cases over 2018-2022.
• CI*Rank ⋔ : 13 (4, 26)
• Percent of Cases with Late Stage :

Grand County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 44.8 with a 95% confidence interval from 25.5 to 73.4 and 4 average annual cases over 2018-2022.
• CI*Rank ⋔ : 12 (1, 33)
• Percent of Cases with Late Stage :

La Plata County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 46.1 with a 95% confidence interval from 36.3 to 58.0 and 17 average annual cases over 2018-2022.
• CI*Rank ⋔ : 11 (1, 31)
• Percent of Cases with Late Stage :

Larimer County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 46.3 with a 95% confidence interval from 42.0 to 50.9 and 93 average annual cases over 2018-2022.
• CI*Rank ⋔ : 10 (4, 23)
• Percent of Cases with Late Stage :

Boulder County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 46.5 with a 95% confidence interval from 42.0 to 51.3 and 85 average annual cases over 2018-2022.
• CI*Rank ⋔ : 9 (3, 23)
• Percent of Cases with Late Stage :

El Paso County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 47.5 with a 95% confidence interval from 44.4 to 50.8 and 182 average annual cases over 2018-2022.
• CI*Rank ⋔ : 8 (3, 18)
• Percent of Cases with Late Stage :

Chaffee County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 48.6 with a 95% confidence interval from 30.5 to 74.0 and 6 average annual cases over 2018-2022.
• CI*Rank ⋔ : 7 (1, 33)
• Percent of Cases with Late Stage :

Routt County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 51.1 with a 95% confidence interval from 35.3 to 72.0 and 7 average annual cases over 2018-2022.
• CI*Rank ⋔ : 6 (1, 32)
• Percent of Cases with Late Stage :

Delta County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 51.6 with a 95% confidence interval from 36.7 to 70.7 and 10 average annual cases over 2018-2022.
• CI*Rank ⋔ : 5 (1, 32)
• Percent of Cases with Late Stage :

Las Animas County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 52.3 with a 95% confidence interval from 31.1 to 83.0 and 5 average annual cases over 2018-2022.
• CI*Rank ⋔ : 4 (1, 33)
• Percent of Cases with Late Stage :

Summit County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 54.1 with a 95% confidence interval from 38.8 to 73.8 and 9 average annual cases over 2018-2022.
• CI*Rank ⋔ : 3 (1, 30)
• Percent of Cases with Late Stage :

Teller County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 56.9 with a 95% confidence interval from 40.6 to 78.4 and 10 average annual cases over 2018-2022.
• CI*Rank ⋔ : 2 (1, 30)
• Percent of Cases with Late Stage :

Prowers County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 66.6 with a 95% confidence interval from 39.9 to 104.3 and 4 average annual cases over 2018-2022.
• CI*Rank ⋔ : 1 (1, 32)
• Percent of Cases with Late Stage :

Alamosa County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Baca County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Bent County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Cheyenne County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Clear Creek County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Conejos County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Costilla County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Crowley County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Custer County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Dolores County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Gilpin County²

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Gunnison County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Hinsdale County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Huerfano County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Jackson County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Kiowa County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Kit Carson County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Lake County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Lincoln County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Mineral County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Moffat County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Ouray County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Phillips County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Rio Blanco County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Rio Grande County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Saguache County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

San Juan County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

San Miguel County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Sedgwick County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Washington County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Yuma County²

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate :
• CI*Rank ⋔ : *
• Percent of Cases with Late Stage : *

Notes:
Created by statecancerprofiles.cancer.gov on 03/13/2026 6:47 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 (SEER areas use 20 age groups and NPCR areas use 19 age groups). 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 with Expanded Regional Codes (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. The rates used in CI*Rank are all age-adjusted to the 2000 US standard population using 19 age groups for SEER and NPCR areas. More information about methodology can be found on the CI*Rank website.

Φ Rural–urban county classifications are based on the 2023 USDA Rural–Urban Continuum Codes (except for Connecticut Counties which use 2013 codes). State-level cancer rates for rural areas are calculated using cancer cases registered exclusively in rural counties, while state-level cancer rates for urban areas are calculated using cases registered exclusively in urban counties.

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 2024 submission.

² Source: National Program of Cancer Registries SEER*Stat Database - United States Department of Health and Human Services, Centers for Disease Control and Prevention (based on the 2024 submission).

* 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.

Data for United States does not include Puerto Rico.