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. 2014 Feb;25(2):191-201.
doi: 10.1007/s10552-013-0321-y. Epub 2013 Nov 19.

Changes in colorectal cancer incidence rates in young and older adults in the United States: what does it tell us about screening

Harland Austin  1 , S Jane Henley, Jessica King, Lisa C Richardson, Christie Eheman
Affiliations

Changes in colorectal cancer incidence rates in young and older adults in the United States: what does it tell us about screening

Harland Austin et al. Cancer Causes Control. 2014 Feb.

Abstract

Purpose: Colorectal cancer (CRC) incidence rates have increased among young adults and have decreased among older adults. We re-evaluated these trends using more recent data covering about 96 % of the United States population.

Methods: Colorectal cancer incidence rates were abstracted from the National Program of Cancer Registries and the Surveillance Epidemiology and End Results analytic files for diagnosis years 1998-2009. We report rates for young adults (age <50 years) and for older adults (age 50 years or older) by four race/ethnicity groupings. We examined CRC incidence rates by stage at diagnosis, tumor subsite, and state. We calculated the correlation between state-specific CRC incidence and prevalence of colonoscopy reported in the Behavioral Risk Factor Surveillance System.

Results: Rectal cancer incidence rates increased from 1998 through 2009 among young non-Hispanic white adults and young blacks. Among older adults, CRC incidence rates decreased among all four race/ethnicity groupings and in all states. The decline was apparent for all stages and for all subsites. States with greater decreases in CRC incidence rates had higher colonoscopy screening rates.

Conclusion: Rectal cancer is increasing among younger adults, for reasons largely unknown. Among older adults, CRC incidence continues to decrease, probably because of increasing uptake of colonoscopy screening. Decreases in CRC incidence are correlated with increased use of colonoscopy, indicating that CRC may be largely preventable through colonoscopy screening. Efforts to increase screening rates in underserved populations would help reduce health disparities associated with this type of cancer.

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Conflict of interest statement

Conflict of interest: No author has any conflict of interest.

Figures

Fig. 1
Fig. 1
Logarithm of CRC incidence rates by year (1998–2009) and tumor subsite according to race/ethnicity among adults aged 50 years or older, all states combined
Fig. 2
Fig. 2
a APCs in overall CRC incidence rates among whites aged 50 years or older by state. b APCs in overall CRC incidence rates among balcks aged 50 years or older by state
Fig. 3
Fig. 3
Funnel plot of state-specific APC in overall CRC among adults aged 50 years or older
Fig. 4
Fig. 4
a Correlation between state-level change in overall CRC incidence rates and S/C endoscopy screening rates among US adults aged 50 years or older. b Correlation between state-level change in overall CRC incidence rates and change in S/C endoscopy screening rates among US adults aged 50 years or older
See this image and copyright information in PMC

References

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