title: Comparison of the discriminative ability of the generic and condition-specific forms of the Child-OIDP index: a study on children with different types of normative dental treatment needs.
abstract: OBJECTIVE
  To compare the discriminative ability of the Generic and Condition-Specific forms of the Child-OIDP index on groups defined by their normative treatment need for dental caries, periodontal disease, malocclusion and traumatic dental injuries.
  
  
  METHODS
  All 1034 11-12-year-old children were included from all the primary schools in a municipal area of Suphanburi Province, Thailand. Children were interviewed about sociodental impacts on quality of life in the past 3 months using the Child-OIDP index, and then clinically examined to assess their normative treatment need for dental caries, periodontal disease, malocclusion and traumatic dental injuries. Discriminative ability of the Generic and the Condition-Specific Child-OIDP (CS-Child-OIDP) was assessed through differences in overall scores and prevalences of oral impacts between groups, as well as through their respective effect sizes and adjusted Odds Ratios (ORs).
  
  
  RESULTS
  Differences in overall scores and prevalences of oral impacts between groups with and without each of the four types of normative dental treatment needs, their corresponding effect sizes and adjusted ORs, were always significant for CS-Child-OIDP. However, when the Generic Child-OIDP was used to discriminate between groups, the respective figures were significant only for groups with and without normative treatment need for dental caries.
  
  
  CONCLUSIONS
  CS-Child-OIDP was better able to discriminate between groups with and without each of the four types of normative dental treatment need. The better performance of CS-Child-OIDP compared with the generic Child-OIDP was independent of the indicator used to assess discriminative ability (i.e. differences between groups, effect sizes or adjusted ORs).
authors.affiliation: Unidad de Investigación en Salud Pública Dental, Departamento de Odontología Social, Universidad Peruana Cayetano Heredia, Lima, Perú. e.bernabe@ucl.ac.uk
authors.forename: Eduardo
authors.initials: E
authors.lastname: Bernabé
authors.forename: Sudaduang
authors.initials: S
authors.lastname: Krisdapong
authors.forename: Aubrey
authors.initials: A
authors.lastname: Sheiham
authors.forename: Georgios
authors.initials: G
authors.lastname: Tsakos
mesh_terms: D000203:Activities of Daily Living; D002648:Child; D003430:Cross-Sectional Studies; D019140:Dental Care for Children / Q000523:psychology / Q000706:statistics & numerical data*; D003731:Dental Caries / Q000453:epidemiology / Q000523:psychology; D003753:Dental Health Surveys; D005260:Female; D006801:Humans; D008297:Male; D008310:Malocclusion / Q000453:epidemiology / Q000523:psychology; D020380:Needs Assessment / Q000706:statistics & numerical data*; D016017:Odds Ratio; D009909:Oral Health; D010510:Periodontal Diseases / Q000453:epidemiology / Q000523:psychology; D015995:Prevalence; D011594:Psychometrics; D011788:Quality of Life; D012044:Regression Analysis; D018434:Sickness Impact Profile; D011795:Surveys and Questionnaires; D013785:Thailand / Q000453:epidemiology; D018677:Tooth Injuries / Q000453:epidemiology / Q000523:psychology