title: Global self-rating of oral health, concerns about oral health, and history of jaw injury related to temporomandibular joint symptoms in Korean adults.
abstract: OBJECTIVE
  To examine the association between temporomandibular joint (TMJ) symptoms and the global self-rating of oral health, concerns about oral health, and a history of jaw injury or third molar extraction in a representative Korean population.
  
  
  METHODS
  From the Korean National Oral Health Survey 2006, 4,546 adults aged 18 years and older were included in the analysis. The dependent variable was TMJ symptoms. The independent variables were the global self-rating of oral health, concerns about oral health, and a history of jaw injury or third molar extraction. The demographic information (age and gender), socioeconomic status (education level, monthly household income, vocation, and residence), and behavioral factors (recent dental visit and smoking) were evaluated as confounders. Multivariate linear and logistic regression analyses were applied.
  
  
  RESULTS
  The overall prevalence of TMJ symptoms in Koreans was 15.3%. The younger, more educated, middle class, those employed in office and sales, and those who resided in city areas had more TMJ symptoms. The TMJ symptoms were significantly associated with the global self-rating of oral health, concerns about oral health, and history of jaw injury. No significant association was found between the TMJ symptoms and a history of a third molar extraction. The global self-rating of oral health, concerns about oral health, and history of jaw injury had a dose-effect relationship with the severity of TMJ symptoms. Age and gender modified the effect of the global self-rating of oral health, concerns about oral health, and the history of jaw injury on TMJ symptoms.
  
  
  CONCLUSIONS
  The global self-rating of oral health, concerns about oral health, and a history of jaw injury might be associated with TMJ symptoms.
authors.affiliation: Department of Preventative and Public Health Dentistry, Dental Research Institute, Seoul National University, Seoul, Korea.
authors.forename: Dong-Hun
authors.initials: DH
authors.lastname: Han
authors.forename: Deok-Young
authors.initials: DY
authors.lastname: Park
authors.forename: Baek-Il
authors.initials: BI
authors.lastname: Kim
authors.forename: Myung-Yun
authors.initials: MY
authors.lastname: Koh
authors.forename: Yong-Woo
authors.initials: YW
authors.lastname: Ahn
authors.forename: Jin-Bom
authors.initials: JB
authors.lastname: Kim
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001294:Attitude to Health; D003729:Dental Care / Q000706:statistics & numerical data; D004522:Educational Status; D005260:Female; D015438:Health Behavior; D006801:Humans; D007182:Income / Q000706:statistics & numerical data; D007568:Jaw / Q000293:injuries*; D008297:Male; D008875:Middle Aged; D008964:Molar, Third / Q000601:surgery; D009790:Occupations / Q000706:statistics & numerical data; D009909:Oral Health / Q000706:statistics & numerical data*; D015995:Prevalence; D056910:Republic of Korea / Q000453:epidemiology; D012111:Residence Characteristics / Q000706:statistics & numerical data; D057566:Self Report; D012737:Sex Factors; D012907:Smoking / Q000453:epidemiology; D012923:Social Class; D013705:Temporomandibular Joint Disorders / Q000453:epidemiology*; D014081:Tooth Extraction / Q000706:statistics & numerical data; D055815:Young Adult