title: [An eight-year longitudinal study for caries status on primary and permanent dentitions in Beijing children].
abstract: OBJECTIVE
  To study whether the caries status of the primary dentition correlated with status of the permanent in the same cohort over an eight-year period. To determine whether the caries status of the primary dentition can be used to predict caries in the permanent dentition.
  
  
  METHODS
  A total of 362 children, 3 - 4 years old in the baseline study in 1992 were re-examined in 2000 based on WHO criteria and methods.
  
  
  RESULTS
  Statistically significant associations were observed between the caries prevalence in primary and permanent teeth (P < 0.01) and between DMFT(s) and dmft(s) (P < 0.01). Children who had caries in the primary teeth were nearly three times more likely to have caries in the permanent teeth (RR = 2.6,95% CI = 1.4 - 4.7, P < 0.001). The highest sensitivity (93.9%) for prediction caries in the permanent dentition was found in caries presence on any of the eight primary molars, for which the relative ratio was 3.3 (95% CI = 1.8 - 6.1, P < 0.001) and the positive prediction value was 85.4%.
  
  
  CONCLUSIONS
  The study determinate clearly that caries status in the primary teeth can be used as a risk indicator for predicting caries in the permanent dentition.
authors.affiliation: Department of Preventive Dentistry, Peking University School of Stomatology, Beijing 100081, China.
authors.forename: Wei-jian
authors.initials: WJ
authors.lastname: Wang
authors.forename: Yi-hong
authors.initials: YH
authors.lastname: Li
authors.forename: Jin-you
authors.initials: JY
authors.lastname: Bian
mesh_terms: D002648:Child; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D004245:DMF Index; D003731:Dental Caries / Q000453:epidemiology*; D019229:Dentition, Permanent; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D012307:Risk Factors; D014094:Tooth, Deciduous