European Archives of Paediatric Dentistry

, Volume 15, Issue 6, pp 435–441 | Cite as

Effect of year one orthodontic treatment on the quality of life of adolescents, assessed by the short form of the Child Perceptions Questionnaire

  • L. G. AbreuEmail author
  • C. A. Melgaço
  • E. M. B. Lages
  • M. H. N. G. Abreu
  • S. M. Paiva
Original Scientific Article



To evaluate the effect of the first 12 months of orthodontic treatment on the quality of life of Brazilian adolescents and to examine the evaluative properties of the short form of the Child Perceptions Questionnaire (CPQ11–14).

Study design and methods

This study involved a sample of 101 adolescents undergoing orthodontic treatment with a fixed appliance. Participants were asked to answer the Brazilian version of the short form of the CPQ11–14 before treatment (T1) and 12 months after the placement of the fixed appliance (T2). Statistical analysis was carried out using the Wilcoxon signed-rank test and the Bonferroni correction for the overall score and the short form of the CPQ11–14 subscales. Responsiveness of the measure and the minimal clinically important difference (MCID) were also evaluated.

Results and statistics

Out of the 101 individuals originally admitted to this study, three were excluded due to cessation of treatment and failure to return the questionnaire, providing a response rate of 97.0 %. Statistically, significant improvements were found in the overall score (P < 0.001) as well as in both emotional well-being (P < 0.001) and social well-being (P = 0.007) subscales. The reductions in score were associated with an effect of size showing moderate clinically meaningful changes in the overall score and in the functional limitations, emotional well-being and social well-being. The MCID was 3.35.


The first 12 months of orthodontic treatment with a fixed appliance had a positive effect on the quality of life of western adolescents.


Quality of life Orthodontic appliances Adolescent Responsiveness 



This study was supported by the National Council for Scientific Development (CNPq), the Coordination for the Improvement of Higher Level Education Personnel (CAPES), and the State of Minas Gerais Research Foundation (FAPEMIG), Brazil.


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Copyright information

© European Academy of Paediatric Dentistry 2014

Authors and Affiliations

  • L. G. Abreu
    • 1
    • 3
    Email author
  • C. A. Melgaço
    • 1
  • E. M. B. Lages
    • 1
  • M. H. N. G. Abreu
    • 2
  • S. M. Paiva
    • 1
  1. 1.Department of Pediatric Dentistry and Orthodontics, School of DentistryFederal University of Minas GeraisBelo HorizonteBrazil
  2. 2.Department of Community and Preventive Dentistry, School of DentistryFederal University of Minas GeraisBelo HorizonteBrazil
  3. 3.Belo HorizonteBrazil

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