title: Reliability of a questionnaire assessing experiences of adolescents in orthodontic treatment.
abstract: OBJECTIVE
  To evaluate the reliability of a questionnaire that assessed the expectations and experiences of adolescent patients about orthodontic treatment.
  
  
  METHODS
  The study included two groups of patients: 30 consecutive patients (19 girls and 11 boys, mean age 14.6 years, SD 2.3 years) naïve to orthodontic treatment, and 30 consecutive adolescent patients (17 girls and 13 boys, mean age 15.1 years, SD 2.0 years) in active orthodontic treatment with fixed appliances in both jaws. A questionnaire comprising 46 items was developed, based upon focus group interviews and previous established questionnaires. The questionnaire covered the following domains: Treatment motivation; treatment expectations; pain and discomfort from teeth, jaws, and face; functional jaw impairment; and questionnaire validity. Internal consistency as well as temporal stability with the test-retest method was investigated.
  
  
  RESULTS
  A majority of the questions exhibited acceptable test-retest reliability, and composite scores yielded excellent reliability for all domains. Internal consistency was acceptable and good face validity was found for all domains.
  
  
  CONCLUSIONS
  The questionnaire can be recommended for use in the assessment of expectations and experiences of orthodontic treatment.
authors.affiliation: Orthodontic Clinic, Public Dental Health Service, County Council of Gävleborg, Sweden. ingalill.feldmann@telia.com
authors.forename: Ingalill
authors.initials: I
authors.lastname: Feldmann
authors.forename: Thomas
authors.initials: T
authors.lastname: List
authors.forename: Mike T
authors.initials: MT
authors.lastname: John
authors.forename: L
authors.initials: L
authors.lastname: Bondemark
mesh_terms: D000293:Adolescent; D005157:Facial Pain / Q000209:etiology; D005260:Female; D006801:Humans; D007568:Jaw / Q000503:physiopathology; D008297:Male; D009971:Orthodontics, Corrective / Q000009:adverse effects / Q000523:psychology*; D017060:Patient Satisfaction; D011594:Psychometrics; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires