Age and health jointly linked to deaths after bowel cancer surgery
Among patients aged 80 or older in the poorest-health category studied, 36% of the mortality rate was not explained by separate age and health associations.
Edited by Boris Djordjevic · AgingResearch.News
An observational nationwide cohort study included 15,673 Danish patients aged 70 or older who had surgery for colorectal cancer that had not spread to distant organs in 2014–2023. Researchers grouped them by age and by the American Society of Anesthesiologists physical status classification, which assesses health before surgery. They examined classes I, II and III.
At 90 days, overall survival was 94.0% among patients aged 80 or older, compared with 97.9% among those aged 70–79. Survival also fell as physical status class increased. The combined association of age and physical status with mortality exceeded their separate associations. This interaction accounted for 21% of the mortality rate among patients aged 80 or older in class II and 36% among those in class III.
Why it matters
For older colorectal cancer patients in class III, the authors suggested that reducing risk factors or intensifying monitoring after surgery may help reduce mortality.
Caveats
This observational study cannot establish causation or show whether reducing risk factors or closer monitoring would reduce mortality. It covered Danish surgical patients aged 70 or older with non-metastatic colorectal cancer, not younger patients or those with distant spread.
The paper
Regional Hospital Randers
Surgical Oncology, Oct 20, 2026
