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Updated: May 20, 2025
06:46
Competing-Risk Nomogram for Predicting Cancer-Specific Survival in Multiple Primary Colorectal Cancer Patients after Surgery
Published on: September 27, 2024
195
Surgical Approach and Variation in Long-Term Survival Following Colorectal Cancer Surgery Using Instrumental Variable
Cody Lendon Mullens1,2,3, Sarah Sheskey2, Edward C Norton3,4,5
1From the Department of Surgery, University of Michigan, Ann Arbor, MI.
Summary
Minimally invasive surgery for colon and rectal cancer improves long-term survival. However, the expansion of these techniques has not led to proportional survival gains, indicating they are not a sole strategy for improving patient outcomes.
Area of Science:
- Oncology
- Surgical Oncology
- Epidemiology
Background:
- Existing data comparing surgical approaches for colon and rectal cancer are limited by selection bias.
- Better causal inference methods are needed to understand the relationship between surgical approach and long-term survival.
Purpose of the Study:
- To determine if increased use of minimally invasive surgical approaches, compared to open surgery, improves long-term survival after colon and rectal cancer resections.
Main Methods:
- Utilized an instrumental variable (IV) approach with data from the American College of Surgeons National Cancer Database (2011-2018).
- Instrumental variable was the rate of robotic-assisted surgery within hospital regions.
- Proportional hazard modeling estimated risk-adjusted mortality rates for robotic, laparoscopic, and open approaches.
Main Results:
- Included 326,406 colon and 96,979 rectal cancer patients.
- Minimally invasive approaches (robotic, laparoscopic) showed lower 5-year mortality rates compared to open surgery.
- Growth in minimally invasive surgery utilization outpaced improvements in long-term survival.
Conclusions:
- Minimally invasive surgical approaches are associated with improved long-term survival in colon and rectal cancer patients.
- The expansion of minimally invasive techniques has not correlated with commensurate survival improvements.
- Increasing minimally invasive approaches alone may not be a sufficient strategy to enhance long-term patient outcomes.
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