title: The rapid assessment of disease activity in rheumatology (radar) questionnaire. Validity and sensitivity to change of a patient self-report measure of joint count and clinical status.
abstract: OBJECTIVE
  This study documents the measurement properties of a brief, self-administered questionnaire of disease signs and symptoms in patients with rheumatoid arthritis.
  
  
  METHODS
  The Rapid Assessment of Disease Activity in Rheumatology (RADAR) questionnaire assesses joint pain/tenderness and clinical status. One hundred ninety-three pairs of RADAR forms were completed by 45 subjects and their assigned clinician evaluators.
  
  
  RESULTS
  Subject-clinician agreement (intraclass correlation coefficients [ICC]) for joint pain/tenderness and clinical status ranged from 0.52 to 0.87 (P = 0.0001), with 83% greater than or equal to 0.65. The ICC for change in joint scores over 6 months was 0.83 (P = 0.0001).
  
  
  CONCLUSIONS
  The 2-page RADAR questionnaire produces valid estimates of joint count and clinical status that are sensitive to change.
authors.affiliation: Arthritis Center, Boston University School of Medicine, Massachusetts.
authors.forename: J H
authors.initials: JH
authors.lastname: Mason
authors.forename: J J
authors.initials: JJ
authors.lastname: Anderson
authors.forename: R F
authors.initials: RF
authors.lastname: Meenan
authors.forename: K M
authors.initials: KM
authors.lastname: Haralson
authors.forename: D
authors.initials: D
authors.lastname: Lewis-Stevens
authors.forename: J L
authors.initials: JL
authors.lastname: Kaine
mesh_terms: D000328:Adult; D000368:Aged; D001172:Arthritis, Rheumatoid / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000503:physiopathology*; D010808:Physical Examination; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D011795:Surveys and Questionnaires