title: The Illness Management Survey: identifying adolescents' perceptions of barriers to adherence.
abstract: OBJECTIVE
  To develop a self-report measure of barriers to adherence and to evaluate its reliability and validity in a sample of adolescents with asthma.
  
  
  METHODS
  The Illness Management Survey (IMS) was developed through item generation, expert panel review, and focus group administration. Adolescents with asthma (N = 152) completed the measure. Participants reported on perceived drawbacks to medication, risk-taking behavior, and social desirability tendencies. Providers rated adolescents' illness severity and adherence. Reliability and validity of the IMS were assessed, and factor structure was examined.
  
  
  RESULTS
  The 27-item IMS shows high internal consistency (alpha =.87). Scores correlate with perceived medication drawbacks, risk taking, and self- and provider reports of adherence. Principal-components analysis indicates five domains of barriers, accounting for 52.4% of the variance: disease/regimen issues, cognitive difficulties, lack of social support/lack of self-efficacy, denial/distrust, and peer/family issues.
  
  
  CONCLUSIONS
  Preliminary data indicate that the IMS reliably and validly assesses perceived barriers to adherence within this sample of adolescents with asthma. It shows promise as a tool for identifying subgroups of nonadherent adolescents.
authors.affiliation: Department of Psychology, The Children's Hospital of Philadelphia, PA 19104, USA. logan@email.chop.edu
authors.forename: Deirdre
authors.initials: D
authors.lastname: Logan
authors.forename: Nataliya
authors.initials: N
authors.lastname: Zelikovsky
authors.forename: Larissa
authors.initials: L
authors.lastname: Labay
authors.forename: Jonathan
authors.initials: J
authors.lastname: Spergel
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D001249:Asthma / Q000523:psychology* / Q000628:therapy; D002648:Child; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D010349:Patient Compliance / Q000523:psychology*; D012494:Sampling Studies; D016896:Treatment Outcome