D S Michaud1, K T Kelsey2, E Papathanasiou3, C A Genco4, E Giovannucci5. 1. Department of Public Health and Community Medicine, Tufts University School of Medicine, Boston Department of Epidemiology dominique.michaud@tufts.edu. 2. Department of Epidemiology Department of Pathology and Laboratory Medicine, Brown University School of Medicine, Providence. 3. Department of Periodontology, Tufts University School of Dental Medicine, Boston. 4. Department of Integrative Physiology and Pathobiology, Tufts University School of Medicine, Boston. 5. Department of Nutrition Department of Epidemiology, Harvard School of Public Health, Boston Channing Division of Network Medicine, Department of Medicine, Harvard Medical School and Brigham and Women's Hospital, Boston, USA.
Abstract
BACKGROUND: Periodontal disease has a direct impact on the immune response and has been linked to several chronic diseases, including atherosclerosis and stroke. Few studies have examined the association between periodontal disease and cancer. PATIENTS AND METHODS: A total of 19 933 men reported being never smokers (of cigarette, pipes or cigars) in the Health Professionals' Follow-up Study. Periodontal disease status and teeth number were self-reported at baseline and during follow-up. All cancers were ascertained during 26 years of follow-up. Cox's proportional hazard models were used to estimate hazard ratios (HRs) and 95% confidence intervals (95% CIs) adjusting for risk factors. RESULTS: A 13% increase in total cancer was observed among men reporting periodontitis at baseline, and a 45% increase in risk was observed among men with advanced periodontitis (periodontitis with <17 remaining teeth). Periodontitis was not associated with prostate cancer, colorectal cancer or melanoma, the three most common cancers in this cohort of never smokers, but a 33% increase in risk was observed for smoking-related cancers (lung, bladder, oropharnygeal, esophageal, kidney, stomach and liver cancers; HR = 1.33, 95% CI 1.07-1.65). Men with advanced periodontitis had an HR of 2.57 (95% CI 1.56-4.21; P = 0.0002) for smoking-related cancers, compared with men who did not have periodontitis and had 17 teeth or more. Advanced periodontitis was associated with elevated risks of esophageal and head and neck cancers (HR = 6.29, 95% CI 2.13-18.6; based on five cases with advanced periodontitis) and bladder cancer (HR = 5.06, 95% CI 2.32-11.0; based on nine cases with advanced periodontitis). CONCLUSIONS: Advanced periodontitis was associated with a 2.5-fold increase in smoking-related cancers among never smokers. Periodontitis may impact cancer risk through system immune dysregulation. Further studies need to examine the immune impact of advanced periodontitis on cancer, especially for cancers known to be caused by smoking.
BACKGROUND:Periodontal disease has a direct impact on the immune response and has been linked to several chronic diseases, including atherosclerosis and stroke. Few studies have examined the association between periodontal disease and cancer. PATIENTS AND METHODS: A total of 19 933 men reported being never smokers (of cigarette, pipes or cigars) in the Health Professionals' Follow-up Study. Periodontal disease status and teeth number were self-reported at baseline and during follow-up. All cancers were ascertained during 26 years of follow-up. Cox's proportional hazard models were used to estimate hazard ratios (HRs) and 95% confidence intervals (95% CIs) adjusting for risk factors. RESULTS: A 13% increase in total cancer was observed among men reporting periodontitis at baseline, and a 45% increase in risk was observed among men with advanced periodontitis (periodontitis with <17 remaining teeth). Periodontitis was not associated with prostate cancer, colorectal cancer or melanoma, the three most common cancers in this cohort of never smokers, but a 33% increase in risk was observed for smoking-related cancers (lung, bladder, oropharnygeal, esophageal, kidney, stomach and liver cancers; HR = 1.33, 95% CI 1.07-1.65). Men with advanced periodontitis had an HR of 2.57 (95% CI 1.56-4.21; P = 0.0002) for smoking-related cancers, compared with men who did not have periodontitis and had 17 teeth or more. Advanced periodontitis was associated with elevated risks of esophageal and head and neck cancers (HR = 6.29, 95% CI 2.13-18.6; based on five cases with advanced periodontitis) and bladder cancer (HR = 5.06, 95% CI 2.32-11.0; based on nine cases with advanced periodontitis). CONCLUSIONS:Advanced periodontitis was associated with a 2.5-fold increase in smoking-related cancers among never smokers. Periodontitis may impact cancer risk through system immune dysregulation. Further studies need to examine the immune impact of advanced periodontitis on cancer, especially for cancers known to be caused by smoking.
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