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Interpretation of Incidence Rates Data

Incidence Rate Report for Montana by County

All Cancer Sites (All Stages^), 2017-2021

All Races (includes Hispanic), Both Sexes, Ages <65

Sorted by Count

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.

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


Montana6


US (SEER+NPCR)1


Yellowstone County6


Flathead County6


Missoula County6


Gallatin County6


Lewis and Clark County6


Cascade County6


Ravalli County6


Silver Bow County6


Lake County6


Lincoln County6


Park County6


Jefferson County6


Sanders County6


Hill County6


Glacier County6


Custer County6


Stillwater County6


Carbon County6


Fergus County6


Rosebud County6


Big Horn County6


Roosevelt County6


Richland County6


Broadwater County6


Madison County6


Deer Lodge County6


Valley County6


Dawson County6


Powell County6


Musselshell County6


Beaverhead County6


Teton County6


Pondera County6


Mineral County6


Blaine County6


Chouteau County6


Toole County6


Phillips County6


Sheridan County6


Sweet Grass County6


Fallon County6


Granite County6


Liberty County6


Wheatland County6


Meagher County6


Judith Basin County6


McCone County6


Daniels County6


Powder River County6


Carter County6


Prairie County6


Garfield County6 Golden Valley County6 Petroleum County6 Treasure County6 Wibaux County6

Notes:
Created by statecancerprofiles.cancer.gov on 07/14/2025 7:14 pm.

State Cancer Registries may provide more current or more local data.
Trend
Rising when 95% confidence interval of average annual percent change is above 0.
Stable when 95% confidence interval of average annual percent change includes 0.
Falling when 95% confidence interval of average annual percent change is below 0.

† 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.
‡ Incidence data come from different sources. The Average Annual Percent Change (AAPC) is based on the APCs calculated by Joinpoint. Due to data availability issues, the time period used in the calculation of the joinpoint regression model may differ for selected counties.

Rates and trends are computed using different standards for malignancy. For more information see malignant.html.

^ All Stages refers to any stage in the Surveillance, Epidemiology, and End Results (SEER) Summary/Historic Combined Summary Stage (2004+).
⋔ 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.
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).
8 Source: Incidence data provided by the SEER Program. AAPCs are calculated by the Joinpoint Regression Program and are based on APCs. Data 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. Population counts for denominators are based on Census populations as modified by NCI. The US Population Data File is used with SEER November 2023 data.

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