title: The Gap Study (GapS) interview--developing a process to determine the meaning and determinants of quality of life in children with arthritis and rheumatic disease.
abstract: OBJECTIVE
  Quality of Life (QOL) is a ubiquitous yet rarely precisely defined term. QOL may be determined by the differences (gaps) between our current situation and our expectations. Contemporary methods of measuring QOL often do not take these gaps into consideration. We performed this study to develop items and methods for measuring and valuing these gaps in order to better determine individual QOL for children with rheumatic diseases.
  
  
  METHODS
  We generated items from literature review, other QOL measures and interviews with pediatric rheumatology patients and their families. Gap-scales to measure the discrepancy between a child's current state and the expected or desired state were designed and tested iteratively in pilot interviews.
  
  
  RESULTS
  Thirty-one children (mean age=13.5 years, age range=6-17 years) and 22 parents were recruited through pediatric rheumatology clinics. The process of item generation, reduction and preliminary formatting yielded a list of 72 items. We developed a 3-point categorical scale of importance and a vertical visual analog scale (VAS) to determine individual valuation of items. 5 gap-scales were developed to reflect different aspects of the discrepancy between the child's current and expected or desired states for different QOL items.
  
  
  CONCLUSIONS
  We have developed a QOL interview based on theory that we can now test to see if it will enrich our understanding of the determinants of QOL in pediatric rheumatology patients and other chronically ill children.
authors.affiliation: Division of Rheumatology, Research Institute, The Hospital for Sick Children, and Department of Pediatrics, University of Toronto, Ontario, Canada.
authors.forename: G W K
authors.initials: GW
authors.lastname: Gong
authors.forename: M
authors.initials: M
authors.lastname: Barrera
authors.forename: J
authors.initials: J
authors.lastname: Beyene
authors.forename: S
authors.initials: S
authors.lastname: Bhat
authors.forename: M
authors.initials: M
authors.lastname: Carcao
authors.forename: S
authors.initials: S
authors.lastname: Lord
authors.forename: U G
authors.initials: UG
authors.lastname: Narayanan
authors.forename: L
authors.initials: L
authors.lastname: Sung
authors.forename: N L
authors.initials: NL
authors.lastname: Young
authors.forename: B M
authors.initials: BM
authors.lastname: Feldman
mesh_terms: D000293:Adolescent; D000328:Adult; D001168:Arthritis / Q000150:complications* / Q000523:psychology / Q000628:therapy; D002648:Child; D005260:Female; D006801:Humans; D007407:Interviews as Topic; D008297:Male; D008875:Middle Aged; D017060:Patient Satisfaction; D010865:Pilot Projects; D011788:Quality of Life / Q000523:psychology*; D015203:Reproducibility of Results; D012216:Rheumatic Diseases / Q000503:physiopathology / Q000523:psychology* / Q000628:therapy; D011795:Surveys and Questionnaires; D016896:Treatment Outcome