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Background  The objective of this study was to evaluate the convergent validity between the domains of the Autoquestionnaire Qualité de Vie Enfant image (AUQUEI) and the Child Perceptions Questionnaire instrument (CPQ 11–14 ) among schoolchildren and to assess the difference between socio-economic and clinical variables associated with their scores.    Methods  An analytical cross-sectional study was conducted in Juiz de Fora, Minas Gerais, Brazil, with 515 schoolchildren aged 12 years from 22 public and private schools, selected with the use of a random multistage sampling design. They were clinically examined for dental caries experience (DMFT and dmft index) and orthodontic treatments needs (DAI index) and were asked to complete the Brazilian versions of Child Perception Questionnaire (CPQ 11–14 ) and Autoquestionnaire Qualité de Vie Enfant image (AUQUEI). In addition, a questionnaire was sent to their parents inquiring about their socio-economic status and home characteristics. The convergent validity of the Brazilian versions of CPQ 11–14  and AUQUEI instruments was analyzed by Spearman’s correlation coefficients. For comparison between the summarized scores of each questionnaire with regard to the schoolchildren’s socio-environmental and clinical aspects the nonparametric Mann–Whitney was used at level of significance of 5%.    Results  The mean DMFT index was 1.09 and 125 (24.3%) children had orthodontic treatment needs (DAI ≥ 31). There was a similarity and a weak correlation between the scores of the domains of CPQ 11–14  and AUQUEI (r ranged between −0.006 and 0.0296). In addition, a significant difference was found between the scores of the two instruments according to the socio-economic variables (p < 0.05) and presence of teeth with carious lesions (p < 0.05).    Conclusions  The general and oral health-related quality of life instruments AUQUEI and CPQ 11–14  were both found to be useful, and significant influence of socio-economic and clinical variables were detected with both instruments.

bmc oral health

Oral health, socio-economic and home environmental factors associated with general and oral-health related quality of life and convergent validity of two instruments