title: Perceived health status in self-reported adolescent idiopathic scoliosis: a survey based on a population of twins.
abstract: METHODS
  A questionnaire-based identification of adolescent idiopathic scoliosis (AIS) patients and measure of Short Form-12 (SF-12) in a big twin-cohort.
  
  
  OBJECTIVE
  The purpose was to study the effect that AIS has on the health-related quality of life in the patients.
  
  
  BACKGROUND
  The effect of AIS on the perceived health status is still unclear.
  
  
  METHODS
  All 46,418 twins registered in the Danish Twin Registry born between 1931 and 1982 were sent a questionnaire including SF-12. The questionnaire was returned by 34,944 (75.3%) twins representing 23,204 pairs.
  
  
  RESULTS
  A group of 220 subjects considered to have AIS was identified corresponding to a prevalence of 1.05%. In this group, the SF-12 could be calculated in 187 twins.
  
  
  CONCLUSIONS
  We found the perceived both mental and physical health status from SF-12 to be moderately but significantly worse than in controls. Approximately 75% of the twins with AIS reported to have the same or a better health than their twin- and age-matched peers.
authors.affiliation: Spine Section, Department of Orthopaedic Surgery, Sygehus Lillebaelt, Denmark. mikkel@dadlnet.dk
authors.forename: Mikkel Ø
authors.initials: MØ
authors.lastname: Andersen
authors.forename: Karsten
authors.initials: K
authors.lastname: Thomsen
authors.forename: Kirsten O
authors.initials: KO
authors.lastname: Kyvik
mesh_terms: D000203:Activities of Daily Living / Q000523:psychology; D000328:Adult; D017677:Age Distribution; D000367:Age Factors; D017668:Age of Onset; D015331:Cohort Studies; D015897:Comorbidity / Q000639:trends; D003718:Denmark / Q000453:epidemiology; D004185:Disability Evaluation; D018450:Disease Progression; D005260:Female; D006304:Health Status; D006306:Health Surveys; D006801:Humans; D008297:Male; D008875:Middle Aged; D011788:Quality of Life / Q000523:psychology; D012042:Registries; D012600:Scoliosis / Q000453:epidemiology* / Q000523:psychology; D012647:Self-Assessment; D011795:Surveys and Questionnaires / Q000592:standards*