title: Test--retest reliability of Oral Health Impact Profile (OHIP-49) in adults with systemic sclerosis.
abstract: OBJECTIVE
  To assess the test-retest reliability of the Oral Health Impact Profile (OHIP) in 3-month intervals among people with systemic sclerosis (SSc).
  
  
  METHODS
  Thirty-nine adults with SSc completed the OHIP-49 at baseline, 3 and 6 months. Intraclass correlation (ICC), standard error of measurement (SEM), SEM%, coefficient of repeatability (CoR), and 95% limits of agreement (LoA) were used to assess test-retest reliability and measurement variability.
  
  
  RESULTS
  The ICC of the OHIP for the first time point (baseline to 3-month) was excellent (>.80), and the second time point (3-month to 6-month) demonstrated good reproducibility (>.60). However, the large SEM, SEM%, CoR, and 95% LoA indicated that the OHIP was neither a precise measurement nor sensitive to change in response to interventions.
  
  
  CONCLUSIONS
  The values of the ICC indicated that the OHIP scores demonstrated acceptable stability across each of the two 3 months' retest duration, supporting the reliability of the OHIP for group-level comparisons. However, using the OHIP as a measure of an individual's oral health-related quality of life in adults with SSc is not recommended.
authors.affiliation: Professor and and Director of Research, Department of Occupational Therapy, School of Health Professions, University of Alabama, Birmingham, Alabama.
authors.forename: Hon K
authors.initials: HK
authors.lastname: Yuen
authors.forename: Sybil L
authors.initials: SL
authors.lastname: Nelson
mesh_terms: D000328:Adult; D006801:Humans; D009909:Oral Health; D015203:Reproducibility of Results; D012595:Scleroderma, Systemic / Q000503:physiopathology*
keywords: oral health; quality of life