title: [The relationship between early childhood caries and child temperament].
abstract: OBJECTIVE
  To evaluate the differences in temperament between children with early childhood caries (ECC) and an age-matched children without ECC.
  
  
  METHODS
  A total of 219 3-year-old children were selected in urban areas of Beijing, who were physically and mentally healthy. There were 109 children in ECC group, who had unfilled caries in 1 or more surfaces in primary maxillary anterior teeth, and 110 children without caries. The children were examined for ECC levels, and their parents were asked to complete the NYLS Temperament Scale questionnaire. Then the data was collected and analyzed.
  
  
  RESULTS
  Children with difficult, intermediate high or slow-to-warm-up temperament had more severe caries than children with easy or intermediate low temperament. There was a significant difference in temperament attribute "Activity level" between male children with ECC and without ECC. There was a significant difference in temperament attribute "Rhythmicity" between female children with ECC and without ECC.
  
  
  CONCLUSIONS
  There were some differences in temperament between 3-year-old children with ECC and without ECC in urban areas of Beijing.
authors.affiliation: Department of Pediatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhao
authors.forename: Li-hong
authors.initials: LH
authors.lastname: Ge
authors.forename: Chang
authors.initials: C
authors.lastname: Yu
authors.forename: Zhe
authors.initials: Z
authors.lastname: Liu
authors.forename: Yu-feng
authors.initials: YF
authors.lastname: Wang
mesh_terms: D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D004245:DMF Index; D003731:Dental Caries / Q000453:epidemiology / Q000523:psychology*; D005260:Female; D006801:Humans; D008297:Male; D013694:Temperament