Colorectal Cancer Rates Reverse Decades of Decline

Colorectal cancer rates are climbing again in the United States after more than two decades of decline, and the troubling increase is affecting far more than younger adults. New research published in NEJM Evidence reveals that the disease is becoming more common across nearly every age group under 70, raising concerns about a growing public health challenge. Colorectal cancer is already the second leading cause of cancer deaths in the United States and the leading cause among adults younger than 50 (ScienceDaily Health & Medicine). [1]

To investigate the changing pattern, Caitlin Murphy, PhD, MPH, Professor of Pediatrics and Public Health Sciences at the University of Chicago, and her colleagues examined the latest colorectal cancer incidence data from the National Cancer Institute. Their analysis tracked changes in diagnoses from 2000 through 2023. The results revealed a significant reversal. In 2000, the age-adjusted colorectal cancer incidence rate was 55.2 cases per 100,000 people. By 2022, that figure had dropped to 36.7. However, the rate increased to 38.3 in 2023, marking the first overall rise after more than two decades of falling rates (ScienceDaily Health & Medicine). [1]

One of the most striking findings involved people between 45 and 49 years old. From 2019 through 2023, colorectal cancer incidence in this group increased by 12.76% annually, the largest rise recorded among the age groups examined. Researchers believe much of this particular increase can be explained by changes in cancer screening recommendations. National guidelines lowered the recommended starting age for routine colorectal cancer screening from 50 to 45, allowing more people to be tested and more previously undetected cancers to be identified (ScienceDaily Health & Medicine). [1]

Colorectal cancer rates are climbing again in the United States after more than two decades of decline, and the troubling increase is affecting far more than younger adults. New research published in NEJM Evidence reveals that the disease is becoming more common across nearly every age group under 70, raising concerns about a growing public health challenge. Colorectal cancer is already the second leading cause of cancer deaths in the United States and the leading cause among adults younger than 50 (Evidence ID 1). [1]

To investigate the changing pattern, Caitlin Murphy, PhD, MPH, Professor of Pediatrics and Public Health Sciences at the University of Chicago, and her colleagues examined the latest colorectal cancer incidence data from the National Cancer Institute. Their analysis tracked changes in diagnoses from 2000 through 2023. The results revealed a significant reversal. In 2000, the age-adjusted colorectal cancer incidence rate was 55.2 cases per 100,000 people. By 2022, that figure had dropped to 36.7. However, the rate increased to 38.3 in 2023, marking the first overall rise after more than two decades of falling rates (Evidence ID 1). [1]

One of the most striking findings involved people between 45 and 49 years old. From 2019 through 2023, colorectal cancer incidence in this group increased by 12.76% annually, the largest rise recorded among the age groups examined. Researchers believe much of this particular increase can be explained by changes in cancer screening recommendations. National guidelines lowered the recommended starting age for routine colorectal cancer screening from 50 to 45, allowing more people to be tested and more previously undetected cancers to be identified (Evidence ID 1). [1]

Sources

ScienceDaily Health & Medicine

Prepared with AI assistance from the cited sources.