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Published on: January 12, 2013
Body Mass Index, Diabetes and Intrahepatic Cholangiocarcinoma Risk: The Liver Cancer Pooling Project and
Jessica L Petrick1, Jake E Thistle1, Anne Zeleniuch-Jacquotte1
1Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, MD, USA. Department of Population Health, New York University School of Medicine, New York, NY, USA. Channing Division of Network Medicine, Brigham and Women's Hospital, Boston, MA, USA. Department of Epidemiology and Environmental Health, University at Buffalo, Buffalo, NY, USA. Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA. Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA. Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA. Slone Epidemiology Center at Boston University, Boston, MA, USA. Department of Epidemiology & Population Health, Albert Einstein College of Medicine, Bronx, NY, USA. Department of Exercise and Nutrition Sciences, Milken Institute School of Public Health, George Washington University, Washington, DC, USA. Division of Pediatric Epidemiology and Clinical Research and Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA. Epidemiology Research Program, American Cancer Society, Atlanta, GA, USA. VA Boston Healthcare System, Boston, MA, USA. Division of Medical Oncology, National Cancer Centre, Singapore, Singapore. Division of Gastroenterology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.
Obesity and diabetes significantly increase the risk of intrahepatic cholangiocarcinoma (ICC), a less-studied liver cancer. These findings suggest shared risk factors between ICC and hepatocellular carcinoma.
Area of Science:
- Oncology
- Epidemiology
- Public Health
Background:
- Obesity and diabetes are known risk factors for various cancers.
- Previous research primarily focused on hepatocellular carcinoma, neglecting intrahepatic cholangiocarcinoma (ICC).
- There is a need to understand the specific risks associated with metabolic conditions for ICC.
Purpose of the Study:
- To investigate the association between obesity and diabetes and the risk of intrahepatic cholangiocarcinoma (ICC).
- To conduct a pooled analysis and a systematic review/meta-analysis to strengthen the evidence on ICC risk factors.
Main Methods:
- A pooled analysis of 13 US-based prospective cohort studies (Liver Cancer Pooling Project) involving over 1.5 million individuals.
- A systematic review identifying 14 additional studies and a meta-analysis combining pooled data with 5 prospective studies.
- Analysis of hazard ratios (HR) and relative risks (RR) with 95% confidence intervals (CI) to assess risk.
Main Results:
- In the pooled analysis, obesity (HR=1.62) and diabetes (HR=1.81) were associated with significantly increased ICC risk.
- Meta-analysis of prospective cohorts showed obesity (RR=1.49) and diabetes (RR=1.53) increased ICC risk.
- Results were consistent across subgroup analyses, though heterogeneity was noted for diabetes.
Conclusions:
- Obesity and diabetes are significant risk factors for intrahepatic cholangiocarcinoma (ICC).
- The findings suggest shared etiologies between ICC and hepatocellular carcinoma.
- Further prospective studies are recommended to confirm these associations.
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