Yuriko N Koyanagi1, Keitaro Matsuo2, Hidemi Ito3, Kenji Wakai4, Chisato Nagata5, Tomio Nakayama6, Atsuko Sadakane7, Keitaro Tanaka8, Akiko Tamakoshi9, Yumi Sugawara10, Tetsuya Mizoue11, Norie Sawada12, Manami Inoue13, Shoichiro Tsugane12, Shizuka Sasazuki12, Shizuka Sasazuki12, Shoichiro Tsugane12, Manami Inoue13, Motoki Iwasaki, Tetsuya Otani, Norie Sawada12, Taichi Shimazu, Taiki Yamaji, Ichiro Tsuji, Yoshitaka Tsubono, Yoshikazu Nishino, Akiko Tamakoshi9, Keitaro Matsuo2, Hidemi Ito3, Kenji Wakai4, Chisato Nagata5, Tetsuya Mizoue11, Keitaro Tanaka8, Tomio Nakayama6, Atsuko Sadakane7. 1. Department of Preventive Medicine, Kyushu University Faculty of Medical Sciences, Fukuoka Department of Epidemiology, Nagoya University Graduate School of Medicine, Nagoya. 2. Division of Molecular Medicine, Aichi Cancer Center Research Institute, Nagoya Department of Epidemiology, Nagoya University Graduate School of Medicine, Nagoya kmatsuo@aichi-cc.jp. 3. Division of Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya Department of Epidemiology, Nagoya University Graduate School of Medicine, Nagoya. 4. Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya. 5. Department of Epidemiology and Preventive Medicine, Gifu University Graduate School of Medicine, Gifu. 6. Center for Cancer Control and Statistics, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka. 7. Department of Epidemiology, Radiation Effects Research Foundation, Hiroshima. 8. Department of Preventive Medicine, Faculty of Medicine, Saga University, Saga. 9. Department of Public Health, Hokkaido University Graduate School of Medicine, Sapporo. 10. Division of Epidemiology, Department of Public Health and Forensic Medicine, Tohoku University Graduate School of Medicine, Sendai. 11. Department of Epidemiology and International Health, International Clinical Research Center, National Center for Global Health and Medicine, Tokyo. 12. Epidemiology and Prevention Division, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo. 13. Epidemiology and Prevention Division, Research Center for Cancer Prevention and Screening, National Cancer Center, Tokyo AXA Department of Health and Human Security, Graduate School of Medicine, University of Tokyo, Tokyo, Japan.
Abstract
OBJECTIVE: Although cigarette smoking is a well-established risk factor for head and neck cancer, the impact of smoking on head and neck cancer might vary among geographic areas. To date, however, no systematic review of cigarette smoking and head and neck cancer in the Japanese population has yet appeared. METHODS: We conducted a systematic review of previous epidemiological studies for cigarette smoking and head and neck cancer among Japanese. Evaluation of associations was based on the strength of evidence ('convincing', 'probable', 'possible' or 'insufficient') and the magnitude of association ('strong', 'moderate', 'weak' or 'no association'), together with biological plausibility as previously evaluated by the International Agency for Research on Cancer. A meta-analysis was conducted to obtain summary estimates for the overall magnitude of association. RESULTS: We identified five cohort studies and 12 case-control studies. Four of five cohort studies and 11 of 12 case-control studies showed a strong positive association between cigarette smoking and head and neck cancer. Nine of 12 studies indicated a dose-response relationship between cigarette smoking and the risk of head and neck cancer. Meta-analysis of 12 studies indicated that the summary relative risk for ever smokers relative to never smokers was 2.43 (95% confidence interval: 2.09-2.83). Summary relative risks for current and former smokers relative to never smokers were 2.68 (2.08-3.44) and 1.49 (1.05-2.11), respectively. CONCLUSIONS: Cigarette smoking is a convincing risk factor for head and neck cancer in the Japanese population.
OBJECTIVE: Although cigarette smoking is a well-established risk factor for head and neck cancer, the impact of smoking on head and neck cancer might vary among geographic areas. To date, however, no systematic review of cigarette smoking and head and neck cancer in the Japanese population has yet appeared. METHODS: We conducted a systematic review of previous epidemiological studies for cigarette smoking and head and neck cancer among Japanese. Evaluation of associations was based on the strength of evidence ('convincing', 'probable', 'possible' or 'insufficient') and the magnitude of association ('strong', 'moderate', 'weak' or 'no association'), together with biological plausibility as previously evaluated by the International Agency for Research on Cancer. A meta-analysis was conducted to obtain summary estimates for the overall magnitude of association. RESULTS: We identified five cohort studies and 12 case-control studies. Four of five cohort studies and 11 of 12 case-control studies showed a strong positive association between cigarette smoking and head and neck cancer. Nine of 12 studies indicated a dose-response relationship between cigarette smoking and the risk of head and neck cancer. Meta-analysis of 12 studies indicated that the summary relative risk for ever smokers relative to never smokers was 2.43 (95% confidence interval: 2.09-2.83). Summary relative risks for current and former smokers relative to never smokers were 2.68 (2.08-3.44) and 1.49 (1.05-2.11), respectively. CONCLUSIONS: Cigarette smoking is a convincing risk factor for head and neck cancer in the Japanese population.
Authors: Daoshan Zheng; Cecilia Williams; Jeremy A Vold; Justin H Nguyen; Denise M Harnois; Sanjay P Bagaria; Sarah A McLaughlin; Zhaoyu Li Journal: Cancer Lett Date: 2018-09-14 Impact factor: 8.679
Authors: Gaelen Stanford-Moore; Patrick T Bradshaw; Mark C Weissler; Jose P Zevallos; Paul Brennan; Devasena Anantharaman; Behnoush Abedi-Ardekani; Andrew F Olshan Journal: Cancer Causes Control Date: 2018-08-01 Impact factor: 2.506