Impact of Adjuvant Chemotherapy on Survival in Rectal Cancer
Author Information
Author(s): Alorabi Mohamed Osama, Gouda Abdelrahman, Abdeen Mohammed, Said Ahmed, Abdelaal Moamen, Eid Reem, Yahia Maha
Primary Institution: Shefa Al Orman Cancer Hospital, New Tiba City, Egypt
Hypothesis
Does adjuvant chemotherapy improve survival outcomes in rectal cancer patients downstaged to ypT0-2 N0 after neoadjuvant chemoradiotherapy and surgery?
Conclusion
Adjuvant chemotherapy did not significantly improve disease-free survival or overall survival in rectal cancer patients downstaged to ypT0-2 N0 following neoadjuvant chemoradiotherapy and surgery.
Supporting Evidence
- Patients receiving adjuvant chemotherapy had a median age of 47 years compared to 60 years for those who did not.
- Adjuvant chemotherapy showed a trend toward better 3-year disease-free survival (89.5% vs. 81.9%) but was not statistically significant.
- Overall mortality was lower in the adjuvant chemotherapy group (7.3%) compared to the no-adjuvant group (23.3%).
- Univariate and multivariate analyses confirmed no significant effect of adjuvant chemotherapy on disease-free survival or overall survival.
Takeaway
The study found that giving extra chemotherapy after surgery didn't help patients with a certain type of rectal cancer live longer or stay cancer-free compared to those who didn't get the extra treatment.
Methodology
This retrospective study analyzed hospital records of rectal cancer cases from Shefa Al Orman Cancer Hospital between January 2016 and December 2020, focusing on patients downstaged to ypT0-2 N0 after neoadjuvant chemoradiotherapy and surgery.
Potential Biases
Imbalances in baseline characteristics and variability in adjuvant chemotherapy regimens may introduce selection bias.
Limitations
The study's retrospective design limits control over confounding variables, and the relatively small sample size reduces statistical power.
Participant Demographics
Median age was 52 years, with 39 males and 46 females.
Digital Object Identifier (DOI)
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