Home Screening Cuts Colorectal Cancer Death Risk 43% — SkimNews
Get the Health newsletter
Daily health & science — research, biotech, public health, the studies worth knowing. Free.
- Karolinska Institutet researchers found that people who actually participated in the Stockholm-Gotland colorectal cancer screening program faced a 43% lower risk of dying from the disease, based on data from 376,511 people tracked for up to 14 years.
- Sweden's national program offers free at-home fecal occult blood tests every two years to people aged 60-74, with positive samples leading to a colonoscopy; routine screening in Stockholm and Gotland began in 2008.
- The study distinguished between invitation and participation: simply being invited to screening was associated with a 26% lower mortality risk, while actual participation reached 43% — a gap the researchers attributed using statistical adjustments for contamination bias and nonadherence.
- Lead author Johannes Blom, a senior consultant and associate professor at Karolinska Institutet's Department of Clinical Science and Education, noted that around one-third of invited people don't submit a sample, saying the study 'shows that it can actually save lives.'
- Over the follow-up period, researchers recorded 1,668 colorectal cancer deaths, and the earlier evaluation of the same program had found only a 14% mortality reduction for those invited — the new figure for actual participants is substantially larger.
- The analysis, published in JAMA Network Open, was funded by the Swedish Cancer Society, the Swedish Research Council and Region Stockholm, with the researchers declaring no conflicts of interest.
Why it matters: The 43% mortality reduction applies only to people who actually submit a stool sample — and roughly a third of those invited don't. Since Sweden's program reaches everyone aged 60-74 for free, the gap between invitation and participation represents the single largest avoidable share of the benefit.
Ask SkimNews
