Interpretation of Rate/Trend Comparison by Cancer Data
Death Rate/Trend Comparison by Cancer, 2018-2022
Iowa Counties versus United States
Kidney & Renal Pelvis
All Races, Both Sexes
Sorted by priority index
Explanation of Column HeadersState/County - The site and sex combination for this comparison.
Priority Index 1 - The priority index is based upon the direction of the trend and the rate comparison. An index of 1 is the highest priority - that trend is rising and the rate is already higher. An index of 9 is the lowest priority - the trend is falling and the rate is already lower.
Recent Trends - This is an interpretation of the AAPC:
- 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.
AAPC (95% Confidence Interval) - The Average Annual Percent Change is the change in rate over time. These AAPCs are based upon APCs that were calculated by Joinpoint Regression Program
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
United States
- Recent Trend(2) : The trend is fallingfalling because the trend is -1.6 with a 95% confidence interval from -2.6 to -1.2.
- Rate : The death rate is 3.4 with a 95% confidence interval from 3.4 to 3.5 and 14,249 average annual deaths.
Iowa
- Recent Trend(2) : The trend is fallingfalling because the trend is -1.8 with a 95% confidence interval from -7.5 to -0.7.
- Rate : The death rate is 3.9 with a 95% confidence interval from 3.6 to 4.1 and 165 average annual deaths.
Black Hawk County
- Priority Index(1) : The priority index is 6.
- Recent Trend(2) : The trend is stablestable because the trend is -0.2 with a 95% confidence interval from -1.8 to 1.4.
- County Death Rate Compared to US Rate : This death rate is similar compared to the US rate
- Rate : The death rate is 4.4 with a 95% confidence interval from 3.1 to 6.1 and 7 average annual deaths.
- Rate Ratio(3) County to US : The rate ratio is 1.3
Linn County
- Priority Index(1) : The priority index is 6.
- Recent Trend(2) : The trend is stablestable because the trend is -0.7 with a 95% confidence interval from -2.0 to 0.9.
- County Death Rate Compared to US Rate : This death rate is similar compared to the US rate
- Rate : The death rate is 3.5 with a 95% confidence interval from 2.6 to 4.7 and 10 average annual deaths.
- Rate Ratio(3) County to US : The rate ratio is 1.0
Pottawattamie County
- Priority Index(1) : The priority index is 6.
- Recent Trend(2) : The trend is stablestable because the trend is -0.7 with a 95% confidence interval from -2.5 to 1.4.
- County Death Rate Compared to US Rate : This death rate is similar compared to the US rate
- Rate : The death rate is 4.7 with a 95% confidence interval from 3.1 to 6.9 and 6 average annual deaths.
- Rate Ratio(3) County to US : The rate ratio is 1.4
Scott County
- Priority Index(1) : The priority index is 6.
- Recent Trend(2) : The trend is stablestable because the trend is -1.1 with a 95% confidence interval from -2.6 to 0.5.
- County Death Rate Compared to US Rate : This death rate is similar compared to the US rate
- Rate : The death rate is 2.8 with a 95% confidence interval from 1.9 to 4.0 and 6 average annual deaths.
- Rate Ratio(3) County to US : The rate ratio is 0.8
Polk County
- Priority Index(1) : The priority index is 8.
- Recent Trend(2) : The trend is fallingfalling because the trend is -5.0 with a 95% confidence interval from -12.7 to -1.7.
- County Death Rate Compared to US Rate : This death rate is similar compared to the US rate
- Rate : The death rate is 3.9 with a 95% confidence interval from 3.1 to 4.7 and 21 average annual deaths.
- Rate Ratio(3) County to US : The rate ratio is 1.1
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : This death rate is similar compared to the US rate
- Rate : The death rate is 4.4 with a 95% confidence interval from 2.5 to 7.6 and 3 average annual deaths.
- Rate Ratio(3) County to US : The rate ratio is 1.3
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : This death rate is similar compared to the US rate
- Rate : The death rate is 5.5 with a 95% confidence interval from 3.3 to 8.7 and 4 average annual deaths.
- Rate Ratio(3) County to US : The rate ratio is 1.6
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : This death rate is similar compared to the US rate
- Rate : The death rate is 3.6 with a 95% confidence interval from 2.1 to 5.7 and 4 average annual deaths.
- Rate Ratio(3) County to US : The rate ratio is 1.0
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : This death rate is similar compared to the US rate
- Rate : The death rate is 2.9 with a 95% confidence interval from 1.8 to 4.6 and 4 average annual deaths.
- Rate Ratio(3) County to US : The rate ratio is 0.8
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : This death rate is lower compared to the US rate
- Rate : The death rate is 2.2 with a 95% confidence interval from 1.3 to 3.6 and 3 average annual deaths.
- Rate Ratio(3) County to US : The rate ratio is 0.6
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : This death rate is similar compared to the US rate
- Rate : The death rate is 6.2 with a 95% confidence interval from 3.5 to 10.4 and 3 average annual deaths.
- Rate Ratio(3) County to US : The rate ratio is 1.8
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : This death rate is similar compared to the US rate
- Rate : The death rate is 5.9 with a 95% confidence interval from 3.7 to 9.3 and 4 average annual deaths.
- Rate Ratio(3) County to US : The rate ratio is 1.7
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : This death rate is similar compared to the US rate
- Rate : The death rate is 4.0 with a 95% confidence interval from 2.5 to 6.0 and 5 average annual deaths.
- Rate Ratio(3) County to US : The rate ratio is 1.1
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
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- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
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- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
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- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
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- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
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- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
- Priority Index(1) : The priority index cannot be determined.
- Recent Trend(2) : **
- County Death Rate Compared to US Rate : *
- Rate : *
- Rate Ratio(3) County to US : *
Notes:
Created by statecancerprofiles.cancer.gov on 02/07/2025 7:58 pm.
Rising

Stable

Falling

Rate Comparison
Above

Similar

Below

* Data has been suppressed to ensure confidentiality and stability of rate and trend estimates.
** Data are too sparse to provide stable estimates of annual rates needed to calculate trend.
1 Priority indices were created by ordering from rates that are rising and above the comparison rate to rates that are falling and below the comparison rate.
2 Recent trend in death rates is usually an Average Annual Percent Change (AAPC) based on the APCs calculated by Joinpoint Version 5.3.0. Due to data availability issues, the time period and/or calculation method used in the calculation of the trends may differ for selected geographic areas.
3 Rate ratio is the county rate divided by the US rate. Previous versions of this table used one-year rates for states and five-year rates for counties. As of June 2018, only five-year rates are used.
Source: Death data provided by the National Vital Statistics System public use data file. Death rates calculated by the National Cancer Institute using SEER*Stat. Death rates are age-adjusted to the 2000 US standard population (19 age groups: <1, 1-4, 5-9, ... , 80-84, 85+). The Healthy People 2020 goals are based on rates adjusted using different methods but the differences should be minimal. Population counts for denominators are based on Census populations as modified by NCI. The US Population Data File is used with mortality data.
Note: When the population size for a denominator is small, the rates may be unstable. A rate is unstable when a small change in the numerator (e.g., only one or two additional cases) has a dramatic effect on the calculated rate. Suppression is used to avoid misinterpretation when rates are unstable.
State Cancer Registries may provide more current or more local data. Data presented on the State Cancer Profiles Web Site may differ from statistics reported by the State Cancer Registries (for more information).
Data for the following has been suppressed to ensure confidentiality and stability of rate and trend estimates:
Adair County, Adams County, Allamakee County, Appanoose County, Audubon County, Benton County, Boone County, Bremer County, Buchanan County, Buena Vista County, Butler County, Calhoun County, Carroll County, Cass County, Cedar County, Cherokee County, Chickasaw County, Clarke County, Clay County, Clayton County, Crawford County, Davis County, Decatur County, Delaware County, Des Moines County, Dickinson County, Emmet County, Fayette County, Floyd County, Franklin County, Fremont County, Greene County, Grundy County, Guthrie County, Hamilton County, Hancock County, Hardin County, Harrison County, Henry County, Howard County, Humboldt County, Ida County, Iowa County, Jackson County, Jasper County, Jefferson County, Jones County, Keokuk County, Kossuth County, Louisa County, Lucas County, Lyon County, Madison County, Mahaska County, Marion County, Marshall County, Mills County, Mitchell County, Monona County, Monroe County, Montgomery County, Muscatine County, O'Brien County, Osceola County, Page County, Palo Alto County, Plymouth County, Pocahontas County, Poweshiek County, Ringgold County, Sac County, Shelby County, Sioux County, Story County, Tama County, Taylor County, Union County, Van Buren County, Wapello County, Washington County, Wayne County, Webster County, Winnebago County, Winneshiek County, Worth County, Wright County
Trend for the following could not be reliably determined due to small number of deaths per year:
Cerro Gordo County, Clinton County, Dallas County, Dubuque County, Johnson County, Lee County, Warren County, Woodbury County
Interpret Rankings provides insight into interpreting cancer statistics. When the population size for a denominator is small, the rates may be unstable. A rate is unstable when a small change in the numerator (e.g., only one or two additional cases) has a dramatic effect on the calculated rate.
Data for United States does not include Puerto Rico.