Cited by 373Bariatric Surgery and OutcomesCancer Risks and FactorsEsophageal Cancer Research and Treatment

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Bariatric Surgery and the Risk of Cancer in a Large Multisite Cohort

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Abstract

Objective: To determine whether bariatric surgery is associated with a lower risk of cancer. Background: Obesity is strongly associated with many types of cancer. Few studies have examined the relationship between bariatric surgery and cancer risk. Methods: We conducted a retrospective cohort study of patients undergoing bariatric surgery between 2005 and 2012 with follow-up through 2014 using data from a large integrated health insurance and care delivery systems with 5 study sites. The study included 22,198 subjects who had bariatric surgery and 66,427 nonsurgical subjects matched on sex, age, study site, body mass index, and Elixhauser comorbidity index. Multivariable Cox proportional-hazards models were used to examine incident cancer up to 10 years after bariatric surgery compared to the matched nonsurgical patients. Results: After a mean follow-up of 3.5 years, we identified 2543 incident cancers. Patients undergoing bariatric surgery had a 33% lower hazard of developing any cancer during follow-up [hazard ratio (HR) 0.67, 95% confidence interval (CI) 0.60, 0.74, P < 0.001) compared with matched patients with severe obesity who did not undergo bariatric surgery, and results were even stronger when the outcome was restricted to obesity-associated cancers (HR 0.59, 95% CI 0.51, 0.69, P < 0.001). Among the obesity-associated cancers, the risk of postmenopausal breast cancer (HR 0.58, 95% CI 0.44, 0.77, P < 0.001), colon cancer (HR 0.59, 95% CI 0.36, 0.97, P = 0.04), endometrial cancer (HR 0.50, 95% CI 0.37, 0.67, P < 0.001), and pancreatic cancer (HR 0.46, 95% CI 0.22, 0.97, P = 0.04) was each statistically significantly lower among those who had undergone bariatric surgery compared with matched nonsurgical patients. Conclusions: In this large, multisite cohort of patients with severe obesity, bariatric surgery was associated with a lower risk of incident cancer, particularly obesity-associated cancers, such as postmenopausal breast cancer, endometrial cancer, and colon cancer. More research is needed to clarify the specific mechanisms through which bariatric surgery lowers cancer risk.

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  1. Sjostrom, 2009, Effects of bariatric surgery on cancer incidence in obese patients in Sweden (Swedish Obese Subjects Study): a prospective, controlled intervention trial, Lancet Oncol, 10, 653, 10.1016/S1470-2045(09)70159-7 · DOI · Paper page

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Metadata

Authors
Schauer, D. P., Feigelson, H. S., Koebnick, C., Caan, B., Weinmann, S., Leonard, A. C., Powers, J. D., Yenumula, P. R., & Arterburn, D. E.
Affiliations
  • University of Cincinnati (US)
  • Kaiser Permanente (US)
  • Kaiser Permanente Northern California (US)
  • University of Cincinnati Medical Center (US)
  • Kaiser Permanente Washington Health Research Institute (US)
Corresponding author
  • Schauer, Daniel P.
  • Arterburn, David E.
Venue
Annals of Surgery
Published
2019-01
Volume
269
Issue
1
Pages
95-101
ISSN
  • 0003-4932 (ISSN-L)
  • 1528-1140
OpenAlex
W2760432946
Cited by
373
References
38
Citations by year
2026: 20 · 2025: 25 · 2024: 41 · 2023: 64 · 2022: 61 · 2021: 66 · 2020: 45 · 2019: 27
FWCI
26.04
Type
journal article
Language
en
Open access
Locations
  • Annals of Surgery (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Cancer Institute (R01CA175346)
Topics
  • Health Sciences › Medicine › Surgery › Bariatric Surgery and Outcomes
  • Health Sciences › Medicine › Oncology › Cancer Risks and Factors
  • Health Sciences › Medicine › Surgery › Esophageal Cancer Research and Treatment
Keywords
bariatric surgery, cancer risk, obesity, obesity-related cancer, postmenopausal breast cancer, colon cancer, endometrial cancer, pancreatic cancer, morbid obesity, cancer incidence, matched cohort comparison, Elixhauser comorbidity index, body mass index, postoperative follow-up, health insurance claims data, health care costs
MeSH terms
Adolescent, Adult, Aged, Female, Follow-Up Studies, Humans, Male, Middle Aged, Neoplasms, Obesity, Morbid, Prognosis, Retrospective Studies, Time Factors, United States, Body Mass Index, Incidence, Bariatric Surgery, Young Adult

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