One of the simplest cancer-screening tools — a stool test you do at home and mail back — was linked to a large drop in colorectal cancer deaths in a major new study.
Researchers at Sweden’s Karolinska Institutet and Umeå University followed 376,511 people in the Stockholm-Gotland screening program, using a fecal occult blood test (FOBT) that checks stool for tiny, invisible amounts of blood. Over up to 14 years, people who participated in screening had a 43% lower risk of dying from colorectal cancer than those who were invited but did not take part. The findings were published in JAMA Network Open.
Invitation vs. participation
The distinction matters: simply being invited to screen was associated with a 26% lower death risk, while actually completing the test was tied to the larger 43% reduction. About a third of eligible people did not submit a sample — a reminder that a screening program only works if people use it.
Why it matters — and the caveats
Colorectal cancer is highly treatable when caught early, and stool tests are cheap, non-invasive and done at home. This was an observational study, and the authors note that the estimates “depend on statistical adjustments designed to account for different sources of bias, so some uncertainty remains.” People who choose to screen may differ from those who don’t. Still, the results reinforce a consistent message: participating in recommended colorectal screening saves lives. This article summarizes research and is not medical advice; talk to your doctor about the right screening for you.