Factors related to tooth loss among community-dwelling middle-aged and elderly Japanese men

J Epidemiol. 2013;23(4):301-6. doi: 10.2188/jea.je20120180. Epub 2013 Jun 29.


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.

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.

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.

Conclusions: Smoking, low education level, and poor nutritional status were associated with tooth loss among middle-aged and elderly Japanese men.

背景目的:: 大規模な日本人の地域住民のデータを使用し、中高年男性の歯牙喪失に関連する要因を明らかにすること。

方法:: 2002年-2005年に市町村による基本健診を受診し、研究参加に同意した東北地域(岩手県北部地域)に住む40-79歳の男性8352名を対象とした。現在歯数は単一の質問(あなたは何本の歯を持っていますか?(0本、1-9本、10-19本、20本以上))によって評価された。対象者はその質問の答えによって2つのグループ(現在歯数19本以下、20本以上)に分けられた。多変量ロジスティック回帰分析を使い、現在歯数19本以下であることに関連する要因を評価した。

結果:: 対象者の現在歯数0本、1-9本、10-19本、20本以上の人数(%)はそれぞれ、1764(21.1%),1779(21.3%),1836(22.0%),2937(35.6%)であった。対象者全体と65-79歳では現在歯数19本以下であることは高齢、喫煙(現在喫煙、過去喫煙)、低い教育歴と有意な関連がみられた。また現在歯数19本以下であることは低BMI、低アルブミン値、低い現在飲酒者割合と有意な関連がみられた。40-64歳では、現在歯数19本以下であることは低HDL-C値と高HbA1c値と有意な関連がみられたが、65-79歳ではこの関連はみられなかった。

結論:: 喫煙、低い教育歴、不良な栄養状態は日本人の中高年男性の歯牙喪失と関連していることが示唆された。

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Cross-Sectional Studies
  • Humans
  • Independent Living
  • Japan / epidemiology
  • Male
  • Middle Aged
  • Multivariate Analysis
  • Risk Factors
  • Surveys and Questionnaires
  • Tooth Loss / epidemiology*