Obesity is associated with biliary tract cancer mortality and incidence: A pooled analysis of 21 cohort studies in the Asia Cohort Consortium
- Division of Cancer Epidemiology and Prevention Aichi Cancer Center Research Institute Nagoya Japan
- Division of Cancer Information and Control, Department of Preventive Medicine Aichi Cancer Center Research Institute Nagoya Japan, Division of Descriptive Cancer Epidemiology Nagoya University Graduate School of Medicine Nagoya Japan
- Division of Cancer Information and Control, Department of Preventive Medicine Aichi Cancer Center Research Institute Nagoya Japan
- Division of Prevention National Cancer Center Institute for Cancer Control Tokyo Japan
- Division of Prevention National Cancer Center Institute for Cancer Control Tokyo Japan, Research Center for Child Mental Development Hamamatsu University School of Medicine Hamamatsu Japan
- Division of Prevention National Cancer Center Institute for Cancer Control Tokyo Japan, Hitotsubashi Institute for Advanced Study Hitotsubashi University Tokyo Japan
- Institute for Global Health Policy Research National Center for Global Health and Medicine Tokyo Japan
- Healis—Sekhsaria Institute for Public Health Navi Mumbai India
- Division of Cohort Research National Cancer Center Institute for Cancer Control Tokyo Japan
- Department of Public Health Hokkaido University Faculty of Medicine Sapporo Japan
- Division of Epidemiology, Department of Medicine Vanderbilt Epidemiology Center, Vanderbilt‐Ingram Cancer Center, Vanderbilt University Medical Center Nashville Tennessee USA
- Radiation Effects Research Foundation Hiroshima Japan
- Digestive Oncology Research Center, Digestive Diseases Research Institute Tehran University of Medical Sciences Tehran Iran
- Tohoku University Graduate School of Medicine Miyagi Japan
- Graduate School of Cancer Science and Policy, National Cancer Center Goyang Korea
- Department of Epidemiology and Preventive Medicine Gifu University Graduate School of Medicine Gifu Japan
- School of Medicine &, Big Data Research Center Fu Jen Catholic University Taipei Taiwan
- Department of Preventive Medicine Seoul National University College of Medicine Seoul Korea
- Division of Cancer Control and Population Sciences UPMC Hillman Cancer Center, University of Pittsburgh Pittsburgh Pennsylvania USA, Department of Epidemiology Graduate School of Public Health, University of Pittsburgh Pittsburgh Pennsylvania USA
- Department of Social and Preventive Medicine Sungkyunkwan University School of Medicine Gyeonggi‐do Korea
- Department of Preventive Medicine Chonnam National University Medical School Gwangju Korea
- Division of Cohort Research National Cancer Center Institute for Cancer Control Tokyo Japan, National Institute of Health and Nutrition National Institutes of Biomedical Innovation, Health and Nutrition Tokyo Japan
- Department of Epidemiology Shanghai Cancer Institute Shanghai China, Renji Hospital Shanghai Jiaotong University School of Medicine Shanghai China
- Digestive Diseases Research institute Tehran University of Medical Science Tehran Iran
- Genomics Research Center, Academia Sinica Taipei Taiwan
- Departments of Population Health and Environmental Medicine NYU Grossman School of Medicine New York New York USA
- Department of Preventive Medicine Seoul National University College of Medicine Seoul Korea, Cancer Research Institute Seoul National University Seoul Korea
- Division of Cancer Control and Population Sciences UPMC Hillman Cancer Center, University of Pittsburgh Pittsburgh Pennsylvania USA
- Department of Public Health Sciences University of Chicago Chicago Illinois USA
- Stony Brook Cancer Center Stony Brook University Stony Brook New York USA, Department of Medical and Surgical Sciences University of Bologna Bologna Italy
- Saw Swee Hock School of Public Health National University of Singapore Singapore Singapore
- School of Population Medicine and Public Health Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China
- Division of Cancer Epidemiology and Genetics Occupational and Environmental Epidemiology Branch, National Cancer Institute Bethesda Maryland USA
- Seoul National University College of Medicine Seoul Korea
- Division of Cancer Epidemiology and Prevention Aichi Cancer Center Research Institute Nagoya Japan, Department of Cancer Epidemiology Nagoya University Graduate School of Medicine Nagoya Japan
Abstract Body fatness is considered a probable risk factor for biliary tract cancer (BTC), whereas cholelithiasis is an established factor. Nevertheless, although obesity is an established risk factor for cholelithiasis, previous studies of the association of body mass index (BMI) and BTC did not take the effect of cholelithiasis fully into account. To better understand the effect of BMI on BTC, we conducted a pooled analysis using population‐based cohort studies in Asians. In total, 905 530 subjects from 21 cohort studies participating in the Asia Cohort Consortium were included. BMI was categorized into four groups: underweight (<18.5 kg/m 2 ); normal (18.5‐22.9 kg/m 2 ); overweight (23‐24.9 kg/m 2 ); and obese (25+ kg/m 2 ). The association between BMI and BTC incidence and mortality was assessed using hazard ratios (HR) and 95% confidence intervals (CIs) by Cox regression models with shared frailty. Mediation analysis was used to decompose the association into a direct and an indirect (mediated) effect. Compared to normal BMI, high BMI was associated with BTC mortality (HR 1.19 [CI 1.02‐1.38] for males, HR 1.30 [1.14‐1.49] for females). Cholelithiasis had significant interaction with BMI on BTC risk. BMI was associated with BTC risk directly and through cholelithiasis in females, whereas the association was unclear in males. When cholelithiasis was present, BMI was not associated with BTC death in either males or females. BMI was associated with BTC death among females without cholelithiasis. This study suggests BMI is associated with BTC mortality in Asians. Cholelithiasis appears to contribute to the association; and moreover, obesity appears to increase BTC risk without cholelithiasis.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 2222532
- Journal Information:
- International Journal of Cancer, Journal Name: International Journal of Cancer Journal Issue: 7 Vol. 154; ISSN 0020-7136
- Publisher:
- Wiley Blackwell (John Wiley & Sons)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Burden of Total and Cause-Specific Mortality Related to Tobacco Smoking among Adults Aged ≥45 Years in Asia: A Pooled Analysis of 21 Cohorts
Association of Locoregional Control With High Body Mass Index in Women Undergoing Breast Conservation Therapy for Early-Stage Breast Cancer