Colorectal cancer screening could reduce mortality by over 40%

Taking part in colorectal cancer screening could lower the risk of death from the disease by up to 43%, according to new research published in JAMA Network Open. The study, conducted by researchers at Karolinska Institutet and Umeå University in Sweden, examined the impact of screening on mortality rates over a period of up to 14 years.

Colorectal cancer is highly preventable if detected early, and the Swedish healthcare system offers universal screening to individuals aged 60-74 every two years. Participants receive a home testing kit to collect a stool sample, which is analyzed for invisible traces of blood. If blood is detected, further investigation is recommended, typically through a colonoscopy.

In this study, researchers compared individuals who were invited for screening between 2008 and 2012 with a control group who were either invited later or not at all. After accounting for factors that could skew the results, such as some control group members having the opportunity to participate later and some invited individuals not participating, an invitation to screening was linked to a 26% lower risk of dying from colorectal cancer.

However, active participation in the screening process was associated with a significantly higher reduction in mortality risk, at 43%. While the study included a large population of 376,511 individuals and had a long follow-up period, the results still have some uncertainties due to statistical adjustments for potential biases.