title: Periodontal health, oral health behaviours, and chronic obstructive pulmonary disease.
abstract: OBJECTIVE
  To evaluate the associations of periodontal health status and oral health behaviours with chronic obstructive pulmonary disease (COPD).
  
  
  METHODS
  We conducted a case-control study of 306 COPD patients and 328 controls with normal pulmonary function. Their periodontal status and respiratory function were clinically examined and information on oral health behaviours was obtained using a validated questionnaire.
  
  
  RESULTS
  Patients with COPD had fewer teeth and a higher plaque index than the controls. Univariate analysis showed that tooth brushing times and method, experience of dental floss use, dental visit and regular supra-gingival scaling, and oral health knowledge were significantly related to the risk of COPD. After adjusting for age, sex, and body mass index and stratifying by smoking status, inappropriate tooth brushing method (p=0.025 among non-smokers), lower regular supra-gingival scaling (p=0.027 among non-smokers and p<0.0001 among former smokers), and poorer oral health knowledge (p<0.0001 among non-smokers and p=0.019 among former smokers and p=0.044 among current smokers) remained significantly associated with COPD.
  
  
  CONCLUSIONS
  Poor periodontal health, dental care, and oral health knowledge were significantly associated with an increased risk of COPD. Our findings indicate the importance of promoting dental care and oral health knowledge that can be integrated into the prevention and treatment of COPD.
authors.affiliation: Department of Stomatology, Beijing ChaoYang Hospital, Capital Medical University, Beijing, China;
authors.forename: Zuomin
authors.initials: Z
authors.lastname: Wang
authors.forename: Xuan
authors.initials: X
authors.lastname: Zhou
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.forename: Liangqiong
authors.initials: L
authors.lastname: Zhang
authors.forename: Yiqing
authors.initials: Y
authors.lastname: Song
authors.forename: Frank B
authors.initials: FB
authors.lastname: Hu
authors.forename: Chen
authors.initials: C
authors.lastname: Wang
mesh_terms: D016022:Case-Control Studies; D002681:China; D003729:Dental Care / Q000706:statistics & numerical data*; D005260:Female; D015438:Health Behavior; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D009910:Oral Hygiene / Q000706:statistics & numerical data*; D010510:Periodontal Diseases / Q000150:complications*; D010512:Periodontal Index; D029424:Pulmonary Disease, Chronic Obstructive / Q000150:complications*; D012189:Retrospective Studies; D012907:Smoking; D011795:Surveys and Questionnaires