Factors Related to Tooth Loss Among Community-Dwelling Middle-aged and Elderly Japanese Men

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  • Ando Ayumi
    Department of Hygiene and Preventive Medicine, School of Medicine, Iwate Medical University
  • Ohsawa Masaki
    Department of Hygiene and Preventive Medicine, School of Medicine, Iwate Medical University
  • Yaegashi Yumi
    Department of Hygiene and Preventive Medicine, School of Medicine, Iwate Medical University
  • Sakata Kiyomi
    Department of Hygiene and Preventive Medicine, School of Medicine, Iwate Medical University
  • Tanno Kozo
    Department of Hygiene and Preventive Medicine, School of Medicine, Iwate Medical University
  • Onoda Toshiyuki
    Department of Hygiene and Preventive Medicine, School of Medicine, Iwate Medical University
  • Itai Kazuyoshi
    The First Institute of Health Service, Japan Anti-Tuberculosis Association
  • Tanaka Fumitaka
    Division of Cardiology, Nephrology and Endocrinology, Department of Internal Medicine, Iwate Medical University
  • Makita Shinji
    Division of Cardiology, Nephrology and Endocrinology, Department of Internal Medicine, Iwate Medical University
  • Omama Shinichi
    Department of Neurosurgery, School of Medicine, Iwate Medical University
  • Ogasawara Kuniaki
    Department of Neurosurgery, School of Medicine, Iwate Medical University
  • Ogawa Akira
    Department of Neurosurgery, School of Medicine, Iwate Medical University
  • Ishibashi Yasuhiro
    Division of Neurology and Gerontology, Department of Internal Medicine, School of Medicine, Iwate Medical University
  • Kuribayashi Toru
    Department of Health and Physical Education, Faculty of Education, Iwate University
  • Koyama Tomiko
    Iwate Health Service Association
  • Okayama Akira
    The First Institute of Health Service, Japan Anti-Tuberculosis Association

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Background: Using data from a large-scale community-based Japanese population, we attempted to identify factors associated with tooth loss in middle-aged and elderly men.<BR>Methods: A total of 8352 men aged 40 to 79 years who lived in the north of the main island of Japan and underwent health checkups were enrolled between 2002 and 2005. Number of teeth was assessed by the question, “How many teeth do you have (0, 1–9, 10–19, or ≥20)?”. On the basis of the answer to this question, participants were classified into 2 groups (≤19 teeth or ≥20 teeth). Using multivariate logistic regression, factors related to having 19 or fewer teeth were estimated.<BR>Results: The numbers (percentages) of participants who had 0, 1 to 9, 10 to 19, and 20 or more teeth were 1764 (21.1%), 1779 (21.3%), 1836 (22.0%), and 2973 (35.6%), respectively. Among the participants overall and those aged 65 to 79 years, having 19 or fewer teeth was significantly associated with older age, smoking status (current smoking and ex-smoking), and low education level. In addition, men with 19 or fewer teeth were more likely to have a low body mass index and low serum albumin level and less likely to be current alcohol drinkers. Among men aged 40 to 64 years, but not men aged 65 to 79 years, those with 19 or fewer teeth were more likely to have a low serum high-density lipoprotein cholesterol level and high glycosylated hemoglobin (HbA1c) level.<BR>Conclusions: Smoking, low education level, and poor nutritional status were associated with tooth loss among middle-aged and elderly Japanese men.

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