title: Oral health-related quality of life of 11- and 12-year-old public school children in Rio de Janeiro.
abstract: OBJECTIVE
  The objective of this study was to assess the association between oral health-related quality of life (OHRQoL), measured through the Child-OIDP, and demographic characteristics, self-reported oral problems, and clinical oral health measures, among 11- to 12-year-old school children in the city of Rio de Janeiro, Brazil.
  
  
  METHODS
  A cross-sectional study was conducted, having as its target population 11- and 12-year-old students of both sexes, formally enrolled in 6- and 7-year school classes at public schools. A probabilistic sample with complex design was used. OHRQoL was assessed by the Brazilian version of Child-OIDP. Oral exams were conducted, and the presence of dental biofilm, gingival bleeding, DMFT, fluorosis, enamel defects, dental trauma, and malocclusion were recorded.
  
  
  RESULTS
  A total of 571 school children participated with a mean age of 12.0 years and 95% confidence interval (95% CI) from 11.9 to 12.1. A total of 88.7% of the school children presented the impact of oral problems in at least one of the eight daily performances. The activities that had most impacts were eating (81.3%), cleaning mouth (40.5%), and smiling (32.2%). The mean Child-OIDP index was 7.1 with 95% CI from 6.2 to 8.1. The highest scores were in relation to eating (mean = 25.0; 95% CI from 22.4 to 27.6), cleaning mouth (mean = 12.0; 95% CI from 9.1 to 14.9), and smiling (mean = 10.0; 95% CI from 7.5 to 12.5). In the logistic regression model, the Child-OIDP was associated with dental caries experience and with the perception of sensitive teeth, perception of gingival bleeding, and perception of inadequate position of the teeth. In the multinomial regression, we found that the odds of having higher levels of Child-OIDP were positively associated with dental caries experience. Self-reported dental caries, mobile milk teeth, tooth position, bleeding gums, and bad breath were associated with worst OHRQoL.
  
  
  CONCLUSIONS
  It can be concluded that there is an association between dental caries experience and the Child-OIDP index. This association indicates the impact of this condition on the quality of life of school children. Moreover, the Child-OIDP index is explained more by self-reported oral problems than by clinical normative measures.
authors.affiliation: Dental Service, National Institute of Cardiology, Rio de Janeiro, RJ, Brazil. rodolfoalcastro@gmail.com
authors.forename: Rodolfo de A L
authors.initials: Rde A
authors.lastname: Castro
authors.forename: Margareth C
authors.initials: MC
authors.lastname: Portela
authors.forename: Anna T
authors.initials: AT
authors.lastname: Leão
authors.forename: Mauricio T L
authors.initials: MT
authors.lastname: de Vasconcellos
mesh_terms: D000367:Age Factors; D001938:Brazil / Q000453:epidemiology; D002648:Child; D003430:Cross-Sectional Studies; D003753:Dental Health Surveys; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D009059:Mouth Diseases / Q000453:epidemiology / Q000523:psychology; D009909:Oral Health; D015995:Prevalence; D011788:Quality of Life; D012737:Sex Factors; D018709:Statistics, Nonparametric; D014076:Tooth Diseases / Q000453:epidemiology / Q000523:psychology