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Interpretation of Incidence Rates Data

Incidence Rate Report for Montana by County

All Cancer Sites (All Stages^), 2018-2022

All Races (includes Hispanic), Female, All Ages

Sorted by CI*Rank

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.

Recent Trends - This is an interpretation of the AAPC/APC:

AAPC/APC (95% Confidence Interval) - the change in rate over time


Other Notes


Line by Line Interpretation of the Report


Rosebud County2


Golden Valley County2


Prairie County2


Carter County2


Musselshell County2


Powell County2


Yellowstone County2


Lake County2


Flathead County2


Jefferson County2


Stillwater County2


McCone County2


Sanders County2


Silver Bow County2


Phillips County2


Missoula County2


Liberty County2


Wheatland County2


Fallon County2


Glacier County2


Dawson County2


Lincoln County2


Lewis and Clark County2


Hill County2


Roosevelt County2


Pondera County2


Teton County2


Park County2


Toole County2


Cascade County2


Custer County2


Ravalli County2


Big Horn County2


Gallatin County2


Carbon County2


Beaverhead County2


Sheridan County2


Valley County2


Richland County2


Judith Basin County2


Sweet Grass County2


Madison County2


Granite County2


Meagher County2


Mineral County2


Blaine County2


Fergus County2


Broadwater County2


Deer Lodge County2


Chouteau County2


Powder River County2


Daniels County2 Garfield County2 Petroleum County2 Treasure County2 Wibaux County2


Notes:
Created by statecancerprofiles.cancer.gov on 03/21/2026 1:34 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 and trends are computed using different standards for malignancy. For more information see malignant.html.

^ All Stages refers to any stage. 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.

When displaying county information, the CI*Rank for the state is not shown because it's not comparable. To see the state CI*Rank please view the statistics at the US By State level.

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.

Source: SEER and NPCR data. For more specific information please see the table.

* 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.