title: Oral malodor-related parameters in the Chinese general population.
abstract: OBJECTIVE
  To estimate the prevalence of halitosis in the Chinese population and to assess the relationships between halitosis and oral health, social and behavioural factors.
  
  
  METHODS
  The correlation between the incidence of oral malodor and oral health was surveyed in a sample of 2000 individuals (1000 males and 1000 females) aged 15-64 years residing in urban and rural areas. Malodor was measured with both organoleptic measurements and with a portable sulphide monitor. Assessment of oral health included decayed, missing and filled teeth (DMFT), periodontal status, dental plaque, and tongue coating. Behavioural and social factors related with oral health or halitosis were also investigated.
  
  
  RESULTS
  The prevalence of halitosis was 27.5% according to the organoleptic score. The level of volatile sulphur compounds (VSCs) in mouth air was significantly lower in males and in some of the age groups after lunch. Age and location of residence (rural or urban areas) did not influence the VSCs concentration in mouth air. The amount of tongue coating played the most important role in increasing VSCs concentration in mouth air, followed by periodontal status and plaque index values. DMFT, social, and behavioural factors did not contribute to halitosis.
  
  
  CONCLUSIONS
  Tongue coating score, modified sulcus bleeding index and calculus index were factors significantly related to oral malodor in this study.
authors.affiliation: Department of Oral Health Promotion, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan. lxn1968@163.com
authors.forename: Xue Nan
authors.initials: XN
authors.lastname: Liu
authors.forename: Kayoko
authors.initials: K
authors.lastname: Shinada
authors.forename: Xiao Chi
authors.initials: XC
authors.lastname: Chen
authors.forename: Bo Xue
authors.initials: BX
authors.lastname: Zhang
authors.forename: Ken
authors.initials: K
authors.lastname: Yaegaki
authors.forename: Yoko
authors.initials: Y
authors.lastname: Kawaguchi
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D001944:Breath Tests; D002681:China / Q000453:epidemiology; D003728:Dental Calculus / Q000150:complications; D003773:Dental Plaque / Q000150:complications; D005260:Female; D006209:Halitosis / Q000453:epidemiology* / Q000209:etiology; D006801:Humans; D015994:Incidence; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D010510:Periodontal Diseases / Q000150:complications; D010512:Periodontal Index; D015995:Prevalence; D018709:Statistics, Nonparametric; D013457:Sulfur Compounds / Q000032:analysis; D011795:Surveys and Questionnaires; D014059:Tongue / Q000737:chemistry / Q000473:pathology
chemical_list: D013457:Sulfur Compounds