State Cancer Profiles

Interpretation of Historical Trends Data

Historical Trends (1992-2020)

Incidence, Iowa, Colon & Rectum, All Races (incl Hisp), Ages 65+, Both Sexes

Line graph with 29 years and 2 segments
During 1992-1999, the APC¹ in the rate of cancer was stable: 0.8 with a 95% confidence interval from -0.1 to 2.1.
During 1999-2020, the APC¹ in the rate of cancer was falling: -3.6 with a 95% confidence interval from -3.8 to -3.4.
Yearly points:
In 1992, the observed rate was 357.2. The estimated rate was 354.4.
In 1993, the observed rate was 372.8. The estimated rate was 357.3.
In 1994, the observed rate was 354.8. The estimated rate was 360.3.
In 1995, the observed rate was 344.6. The estimated rate was 363.3.
In 1996, the observed rate was 359.9. The estimated rate was 366.4.
In 1997, the observed rate was 367.0. The estimated rate was 369.4.
In 1998, the observed rate was 384.1. The estimated rate was 372.5.
In 1999, the observed rate was 372.3. The estimated rate was 375.6.
In 2000, the observed rate was 358.1. The estimated rate was 362.1.
In 2001, the observed rate was 361.5. The estimated rate was 349.1.
In 2002, the observed rate was 333.2. The estimated rate was 336.6.
In 2003, the observed rate was 319.5. The estimated rate was 324.6.
In 2004, the observed rate was 315.1. The estimated rate was 312.9.
In 2005, the observed rate was 307.0. The estimated rate was 301.7.
In 2006, the observed rate was 300.1. The estimated rate was 290.9.
In 2007, the observed rate was 276.4. The estimated rate was 280.4.
In 2008, the observed rate was 275.9. The estimated rate was 270.4.
In 2009, the observed rate was 253.8. The estimated rate was 260.7.
In 2010, the observed rate was 250.9. The estimated rate was 251.3.
In 2011, the observed rate was 239.9. The estimated rate was 242.3.
In 2012, the observed rate was 226.5. The estimated rate was 233.6.
In 2013, the observed rate was 218.9. The estimated rate was 225.3.
In 2014, the observed rate was 224.3. The estimated rate was 217.2.
In 2015, the observed rate was 208.8. The estimated rate was 209.4.
In 2016, the observed rate was 208.9. The estimated rate was 201.9.
In 2017, the observed rate was 191.4. The estimated rate was 194.6.
In 2018, the observed rate was 182.1. The estimated rate was 187.7.
In 2019, the observed rate was 186.1. The estimated rate was 180.9.
In 2020, the observed rate was 159.3. The estimated rate was 0.0.

Notes:

Created by statecancerprofiles.cancer.gov on 05/18/2024 1:33 am.
Regression lines calculated using the Joinpoint Regression Program (Version 4.8.0.0).
¹ The APC is the Annual Percent Change over the time interval. Rates used in the calculation of the APC are age-adjusted to the 2000 US standard population (19 age groups: <1, 1-4, 5-9, ... , 80-84, 85+).

Explanation of the Calculation of the Trend:
If the APC is less than -1.5, the trend is falling.
If the APC is between -1.5 and -0.5, the trend is slightly falling.
If the APC is between -0.5 and 0.5, the trend is statistically stable.
If the APC is between 0.5 and 1.5, the trend is slightly rising.
If the APC is greater than 1.5, the trend is rising.
Source: Incidence data provided by the SEER Program and the National Program of Cancer Registries SEER*Stat Database United States Department of Health and Human Services, Centers for Disease Control and Prevention. Rates calculated by the National Cancer Institute using SEER*Stat. Rates 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 populations included with the data release have been adjusted for the population shifts due to hurricanes Katrina and Rita for 62 counties and parishes in Alabama, Mississippi, Louisiana, and Texas. The US Population Data File is used with SEER data. Rates and trends in this graph are computed using the same standard for malignancy. For more information see malignant.html

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 (deaths 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+). Population counts for denominators are based on Census populations as modified by NCI. The US populations included with the data release have been adjusted for the population shifts due to hurricanes Katrina and Rita for 62 counties and parishes in Alabama, Mississippi, Louisiana, and Texas. US Population Data File is used with mortality data.