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Influence of BMI on short-term surgical outcome after colorectal cancer surgery: a study based on the Swedish national quality registry

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International Journal of Colorectal Disease Aims and scope Submit manuscript

Abstract

Purpose

It is well known that an increased body mass index (BMI) is associated with cancer development. Results from studies on colorectal cancer (CRC) treatment outcome and BMI are however conflicting. Our hypothesis was that a high as well as a low BMI will have negative effects on short-term outcome after CRC surgery.

Methods

Data from the Swedish Colorectal Cancer Registry from 2007 to 2012 was analyzed. A total of 24,587 patients operated on for CRC were included in the study and divided into one of five categories for BMI. Operative bleeding, operating time, surgical complications, and 30-day mortality were compared between groups.

Results

Operative bleeding as well as operating time was significantly increased when comparing normal-weight patients to overweight (p < 0.001). 15.1 % of normal-weight patients suffered from postoperative surgical complications. This was significantly increased with each BMI step but did not affect the 30-day mortality. However, underweight patients, on the other hand, had fewer complications (13.3 %) but an increased 30-day mortality.

Conclusion

Longer operating times and increased perioperative bleeding may be explanatory factors behind increased postoperative complication rates for CRC patients with higher BMI. In underweight patients, advanced disease may be a reason for a higher 30-day mortality. To improve outcome, specific precautions are suggested when operating on under- as well as overweight CRC patients. We also suggest that the registry introduces a better marker than BMI for central visceral fat—the link between obesity and cancer development. Further studies are needed to analyze the findings in detail and to study long-term effects.

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Correspondence to Thomas Hallgren.

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Hede, P., Sörensson, M.Å., Polleryd, P. et al. Influence of BMI on short-term surgical outcome after colorectal cancer surgery: a study based on the Swedish national quality registry. Int J Colorectal Dis 30, 1201–1207 (2015). https://doi.org/10.1007/s00384-015-2280-0

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  • DOI: https://doi.org/10.1007/s00384-015-2280-0

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