Highlights
- •High body mass index (BMI) plays a key role in the development of several cancer types, including colon cancer.
- •To date, the prognostic impact of BMI in colon cancer is not fully elucidated.
- •In this post-hoc analysis of TOSCA trial, obesity with BMI ≥30 kg/m2 was an independent prognostic factor for relapse-free survival and overall survival.
- •BMI could provide additional and clinical important prognostic information in stage II/III colon cancer patients.
- •Body composition measurement should be tested to better classify visceral fat and refine risk assessment.
Abstract
Background
High body mass index (BMI) plays a key role in the development of colon cancer (CC).
Our post-hoc analysis from the TOSCA trial analyzed the association between BMI and
survival outcomes in terms of relapse-free survival (RFS) and overall survival (OS)
in stage II/III CC patients.
Patients and methods
Patients enrolled in the TOSCA trial between 2007-2013 with BMI data entered the study.
The prognostic impact of BMI on survival outcomes was investigated through uni- and
multivariable Cox regression analyses.
Results
Overall, 1455 patients with stage II/III CC patients were included. The median follow-up
was of 61.5 months; 16.1% of patients relapsed, 11.2% died and 19.5% patients relapsed
or died. No impact of BMI on RFS was detected at univariate or multivariable analyses.
By univariate analysis for OS, a significantly impact of a BMI > 30 kg/m2 was reported (HR [>30 vs <25] 1.57, 95% CI 1.00-2.47, p = 0.049; HR [>30 vs <30] 1.55, 95% CI 1.01-2.37, p = 0.045). Multivariable analyses did not confirm this data. In the subgroup of stage
III patients, a negative survival impact of BMI was found in univariate and multivariable
models both for RFS and for OS.
Conclusions
In our study, obesity with BMI > 30 kg/m2 was an independent prognostic factor for RFS and OS in CC patients treated with adjuvant
chemotherapy, regardless of its duration (3 or 6 months). However, the prognostic
impact of adiposity and body composition measurement should be considered to better
classify patients with high visceral fat and refine their risk assessment.
Keywords
Abbreviations:
BMI (Body Mass Index)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: February 04, 2023
Accepted:
January 31,
2023
Received in revised form:
January 30,
2023
Received:
July 13,
2022
Publication stage
In Press Journal Pre-ProofIdentification
Copyright
© 2023 Published by Elsevier Inc.
