State Cancer Profiles

Interpretation of Incidence Rates Data

Incidence Rate Report for Maryland by County

Breast (Late Stage^), 2017-2021

All Races (includes Hispanic), Female, All Ages

Sorted by Percentlate

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

Maryland⁶

• 2023 Rural-Urban Continuum Codes Φ : N/A
• Rate : The incidence rate is 44.4 with a 95% confidence interval from 43.4 to 45.4 and 1,668 average annual cases over 2017-2021.
• CI*Rank ⋔ : N/A
• Percent of Cases with Late Stage : 31.7

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

Somerset County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 50.1 with a 95% confidence interval from 33.9 to 71.7 and 7 average annual cases over 2017-2021.
• CI*Rank ⋔ : 2 (1, 24)
• Percent of Cases with Late Stage : 37.1

Baltimore City⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 47.4 with a 95% confidence interval from 44.1 to 50.9 and 168 average annual cases over 2017-2021.
• CI*Rank ⋔ : 5 (1, 15)
• Percent of Cases with Late Stage : 36.6

Prince Georges County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 46.3 with a 95% confidence interval from 43.8 to 48.9 and 269 average annual cases over 2017-2021.
• CI*Rank ⋔ : 9 (2, 16)
• Percent of Cases with Late Stage : 35.8

Charles County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 47.6 with a 95% confidence interval from 41.5 to 54.4 and 46 average annual cases over 2017-2021.
• CI*Rank ⋔ : 4 (1, 20)
• Percent of Cases with Late Stage : 35.3

St. Marys County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 47.1 with a 95% confidence interval from 39.6 to 55.6 and 29 average annual cases over 2017-2021.
• CI*Rank ⋔ : 6 (1, 22)
• Percent of Cases with Late Stage : 34.9

Caroline County⁶

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 41.5 with a 95% confidence interval from 29.7 to 56.6 and 9 average annual cases over 2017-2021.
• CI*Rank ⋔ : 17 (1, 24)
• Percent of Cases with Late Stage : 34.1

Cecil County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 45.3 with a 95% confidence interval from 37.8 to 54.0 and 28 average annual cases over 2017-2021.
• CI*Rank ⋔ : 10 (1, 23)
• Percent of Cases with Late Stage : 34.1

Frederick County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 46.6 with a 95% confidence interval from 41.7 to 51.8 and 73 average annual cases over 2017-2021.
• CI*Rank ⋔ : 7 (1, 19)
• Percent of Cases with Late Stage : 34.1

Wicomico County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 45.1 with a 95% confidence interval from 37.4 to 53.8 and 27 average annual cases over 2017-2021.
• CI*Rank ⋔ : 11 (1, 23)
• Percent of Cases with Late Stage : 33.4

Kent County⁶

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 42.0 with a 95% confidence interval from 25.4 to 65.5 and 5 average annual cases over 2017-2021.
• CI*Rank ⋔ : 16 (1, 24)
• Percent of Cases with Late Stage : 31.8

Washington County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 43.7 with a 95% confidence interval from 37.7 to 50.5 and 42 average annual cases over 2017-2021.
• CI*Rank ⋔ : 12 (1, 23)
• Percent of Cases with Late Stage : 31.3

Baltimore County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 46.5 with a 95% confidence interval from 43.8 to 49.2 and 252 average annual cases over 2017-2021.
• CI*Rank ⋔ : 8 (2, 16)
• Percent of Cases with Late Stage : 30.7

Montgomery County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 43.0 with a 95% confidence interval from 40.7 to 45.4 and 275 average annual cases over 2017-2021.
• CI*Rank ⋔ : 13 (7, 20)
• Percent of Cases with Late Stage : 30.4

Allegany County⁶

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 49.0 with a 95% confidence interval from 39.2 to 60.5 and 21 average annual cases over 2017-2021.
• CI*Rank ⋔ : 3 (1, 23)
• Percent of Cases with Late Stage : 30.3

Talbot County⁶

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 50.8 with a 95% confidence interval from 37.6 to 67.4 and 14 average annual cases over 2017-2021.
• CI*Rank ⋔ : 1 (1, 23)
• Percent of Cases with Late Stage : 29.7

Worcester County⁶

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 40.0 with a 95% confidence interval from 31.1 to 50.9 and 18 average annual cases over 2017-2021.
• CI*Rank ⋔ : 20 (1, 24)
• Percent of Cases with Late Stage : 29.2

Calvert County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 42.4 with a 95% confidence interval from 34.7 to 51.3 and 23 average annual cases over 2017-2021.
• CI*Rank ⋔ : 15 (1, 24)
• Percent of Cases with Late Stage : 28.8

Harford County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 42.6 with a 95% confidence interval from 38.0 to 47.5 and 70 average annual cases over 2017-2021.
• CI*Rank ⋔ : 14 (3, 23)
• Percent of Cases with Late Stage : 28.5

Anne Arundel County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 39.9 with a 95% confidence interval from 36.9 to 43.0 and 139 average annual cases over 2017-2021.
• CI*Rank ⋔ : 21 (11, 23)
• Percent of Cases with Late Stage : 28.3

Dorchester County⁶

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 35.2 with a 95% confidence interval from 24.3 to 49.5 and 8 average annual cases over 2017-2021.
• CI*Rank ⋔ : 23 (2, 24)
• Percent of Cases with Late Stage : 28.1

Howard County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 40.1 with a 95% confidence interval from 36.1 to 44.4 and 77 average annual cases over 2017-2021.
• CI*Rank ⋔ : 19 (9, 24)
• Percent of Cases with Late Stage : 28.1

Carroll County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 41.5 with a 95% confidence interval from 36.0 to 47.6 and 45 average annual cases over 2017-2021.
• CI*Rank ⋔ : 18 (4, 24)
• Percent of Cases with Late Stage : 27.7

Garrett County⁶

• 2023 Rural-Urban Continuum Codes Φ : Rural
• Rate : The incidence rate is 33.5 with a 95% confidence interval from 23.3 to 47.4 and 8 average annual cases over 2017-2021.
• CI*Rank ⋔ : 24 (4, 24)
• Percent of Cases with Late Stage : 27.5

Queen Annes County⁶

• 2023 Rural-Urban Continuum Codes Φ : Urban
• Rate : The incidence rate is 38.7 with a 95% confidence interval from 29.1 to 50.7 and 12 average annual cases over 2017-2021.
• CI*Rank ⋔ : 22 (2, 24)
• Percent of Cases with Late Stage : 26.3

Notes:
Created by statecancerprofiles.cancer.gov on 10/11/2024 8:19 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.
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.
⁶ 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 2023 submission).

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