Researchers at the German Cancer Research Center (DKFZ) have found that regular stool tests for colorectal cancer prevention are as effective as colonoscopies, according to a study published in a German health publication. The findings, which were analyzed using a simulation model, suggest that both methods can significantly reduce cancer mortality rates when widely adopted.
Stool Tests and Colonoscopies: A Comparative Analysis
The study, led by Dr. Hermann Brenner at the DKFZ, evaluated the long-term efficacy of two primary colorectal cancer screening methods: the fecal immunochemical test (FIT) and colonoscopy. Researchers used a simulation model based on a multistage progression of colorectal cancer to predict outcomes. The results indicated that both approaches, when performed regularly, could prevent up to 75% of cases and reduce mortality by over 80%.
According to the simulation, the FIT test, which detects hidden blood in stool, should be conducted every two years. Colonoscopies, which allow direct visualization and removal of precancerous polyps, are recommended every 10 years. However, the study emphasizes that the choice between the two methods should be guided by individual preferences, as both are equally effective when adhered to consistently. The study’s authors noted that adherence rates for FIT tests may be higher due to their non-invasive nature, while colonoscopies offer the advantage of therapeutic intervention during the procedure.
The DKFZ, a leading institution in cancer research funded by the German Federal Ministry of Education and Research, has previously contributed to global cancer screening guidelines. Dr. Brenner, a senior scientist at the DKFZ, has published extensively on cancer prevention strategies, including a 2021 meta-analysis in The Lancet Oncology that highlighted the importance of population-level screening. The current study builds on this work, using a mathematical model calibrated with data from the German National Cancer Registry and international cohort studies.
Regulatory bodies in Germany, including the Robert Koch Institute, recommend biennial FIT testing for individuals aged 50–69, aligning with the study’s findings. However, the German Cancer Society (DKG) acknowledges that colonoscopies remain the gold standard for diagnostic confirmation and polyp removal. A 2022 DKG report emphasized that while FIT tests are cost-effective and scalable, they may miss certain lesions, necessitating follow-up colonoscopies for positive results.
Clinical data from the United States, where the U.S. Preventive Services Task Force (USPSTF) recommends colonoscopies every 10 years for average-risk adults starting at age 45
