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Abstract
Aim: The impact of diabetes mellitus (DM) on survival in patients with colorectal cancer and the impact of colorectal cancer on glycemic control were examined. Materials & methods: Patients with colorectal cancer with and without DM were matched 1:1 (2007–2015). Characteristics were compared between the two groups and survival assessed with the Kaplan–Meier method. Mixed models compared hemoglobin A1c and glucose levels over time. Results: In both groups, glucose values decreased during the year following cancer diagnosis (p < 0.001). 5-year overall survival was 56% (95% CI: 42–68%) for DM patients versus 57% (95% CI: 43–69%) for non-DM patients (p = 0.62). Conclusion: DM did not adversely impact survival of patients with colorectal cancer. Colorectal cancer did not affect glycemic control.
Lay abstract The aim of this study was to evaluate the effect of diabetes mellitus (DM) on survival of patients with colorectal cancer and to determine whether colorectal cancer affected glycemic control. From an institutional cancer registry, 170 patients with colorectal cancer were identified and grouped by the presence (n = 85) or absence of DM (n = 85). The groups were matched by age and year of colorectal cancer diagnosis. DM did not decrease the survival and colorectal cancer did not significantly affect glucose levels of patients with DM.
Authors’ contributions
All authors contributed to data acquisition and interpretation, drafting and final review of the manuscript.
Financial & competing interests disclosure
The authors have no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.
No writing assistance was utilized in the production of this manuscript.
Ethical conduct of research
The authors state that they have obtained appropriate institutional review board approval or have followed the principles outlined in the Declaration of Helsinki for all human or animal experimental investigations. In addition, for investigations involving human subjects, informed consent has been obtained from the participants involved.