State Cancer Profiles

Interpretation of Historical Trends Data

Historical Trends (1992-2021)

Incidence, Iowa, All Cancer Sites, API Non-Hispanic, All Ages, Both Sexes

Incidence, Iowa, All Cancer Sites, API Non-Hispanic, All Ages, Both Sexes

Line graph with 30 years and 1 segments
During 1992-2021, the APC¹ in the rate of cancer was stable: -0.4 with a 95% confidence interval from -1.0 to 0.3.
Yearly points:
In 1992, the observed rate was 360.8. The estimated rate was 339.9.
In 1993, the observed rate was 386.2. The estimated rate was 338.4.
In 1994, the observed rate was 346.6. The estimated rate was 337.0.
In 1995, the observed rate was 273.2. The estimated rate was 335.5.
In 1996, the observed rate was 321.3. The estimated rate was 334.0.
In 1997, the observed rate was 467.5. The estimated rate was 332.6.
In 1998, the observed rate was 393.2. The estimated rate was 331.1.
In 1999, the observed rate was 422.2. The estimated rate was 329.7.
In 2000, the observed rate was 392.1. The estimated rate was 328.2.
In 2001, the observed rate was 275.0. The estimated rate was 326.8.
In 2002, the observed rate was 256.6. The estimated rate was 325.4.
In 2003, the observed rate was 341.6. The estimated rate was 323.9.
In 2004, the observed rate was 238.2. The estimated rate was 322.5.
In 2005, the observed rate was 296.8. The estimated rate was 321.1.
In 2006, the observed rate was 336.4. The estimated rate was 319.7.
In 2007, the observed rate was 301.8. The estimated rate was 318.3.
In 2008, the observed rate was 321.6. The estimated rate was 316.9.
In 2009, the observed rate was 292.3. The estimated rate was 315.5.
In 2010, the observed rate was 265.6. The estimated rate was 314.1.
In 2011, the observed rate was 299.4. The estimated rate was 312.8.
In 2012, the observed rate was 351.1. The estimated rate was 311.4.
In 2013, the observed rate was 302.5. The estimated rate was 310.0.
In 2014, the observed rate was 315.1. The estimated rate was 308.7.
In 2015, the observed rate was 298.8. The estimated rate was 307.3.
In 2016, the observed rate was 319.7. The estimated rate was 306.0.
In 2017, the observed rate was 297.7. The estimated rate was 304.7.
In 2018, the observed rate was 290.5. The estimated rate was 303.3.
In 2019, the observed rate was 319.9. The estimated rate was 302.0.
In 2020, the observed rate was 294.7. The estimated rate was N/A.
In 2021, the observed rate was 313.1. The estimated rate was 299.4.

Notes:

• Created by statecancerprofiles.cancer.gov on 07/18/2025 7:31 pm.
• Regression lines calculated using the Joinpoint Regression Program (Version 5.3.0).
• 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.

  
  

  The 2020 incidence rate is displayed but not used in the fit of the trend line(s). Impact of COVID on SEER Cancer Incidence 2020 data.

  Statistics for minorities may be affected by inconsistent race identification between the cancer case reports (sources for numerator of rate) and data from the Census Bureau (source for denominator of rate); and from undercounts of some population groups in the census.
  
  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.