title: A comparison of the index of complexity outcome and need (ICON) with the peer assessment rating (PAR) and the index of orthodontic treatment need (IOTN).
abstract: OBJECTIVE
  To evaluate any relationship between ICON, IOTN and PAR. To establish whether or not ICON could replace these indices as a measure of orthodontic treatment complexity, outcome and need.
  
  
  METHODS
  The study models of 55 consecutively treated cases were examined and PAR, IOTN and ICON recorded.
  
  
  RESULTS
  The study showed significant correlations between IOTN and ICON with respect to need and PAR and ICON with respect to outcome.
  
  
  CONCLUSIONS
  It appears that ICON does reflect UK opinion and the current study provides some evidence that ICON may effectively replace PAR and IOTN as a means of determining need and outcome.
authors.affiliation: Orthodontic Department, Middlesbrough General Hospital, Cleveland. nigel.a.fox@btinternet.com
authors.forename: N A
authors.initials: NA
authors.lastname: Fox
authors.forename: C
authors.initials: C
authors.lastname: Daniels
authors.forename: T
authors.initials: T
authors.lastname: Gilgrass
mesh_terms: D000704:Analysis of Variance; D015982:Bias; D016001:Confidence Intervals; D006801:Humans; D008310:Malocclusion / Q000145:classification* / Q000628:therapy; D003765:Models, Dental; D020380:Needs Assessment / Q000145:classification; D015588:Observer Variation; D009971:Orthodontics, Corrective / Q000145:classification; D015203:Reproducibility of Results; D012189:Retrospective Studies; D013223:Statistics as Topic; D016896:Treatment Outcome; D006113:United Kingdom