title: Development of a shortened Japanese version of the Oral Health Impact Profile (OHIP) for young and middle-aged adults.
abstract: OBJECTIVE
  The aim of this paper is to develop a short version of the Japanese OHIP (OHIP-J) appropriate for use in young and middle-aged adults, and to evaluate its properties using cross-sectional data.
  
  
  METHODS
  A study population of 8,658 workers aged 20-59 years rated their oral health by means of a self-administered questionnaire. Using a factor analysis approach, a shortened version of OHIP-J was derived. Internal consistency, floor effect, and construct validity were determined.
  
  
  RESULTS
  We derived a subset of 18 items from OHIP-J (OHIP-JA18), grouped into four subscales: "functional limitation", "physical pain", "psychological discomfort", and "disability & handicap". All four subscales had acceptable internal consistency (Cronbach alpha > 0.79). OHIP-JA18 demonstrated an acceptable floor effect, which was determined by the proportion of subjects who obtained a 0 score (< 30%); however, the floor effect of the ordinary shortened version based on OHIP-14 (OHIP-J14) was not acceptable. We confirmed the conceptual framework of OHIP-JA18 that "disability & handicap" is affected by "functional limitation", "physical pain" and "psychological discomfort", because the model fitted the data moderately well by structural equation modeling (SEM) analysis (GFI = 0.90, RMSEA = 0.08).
  
  
  CONCLUSIONS
  OHIP-JA18 demonstrated acceptable measurement parameters to justify its use in outcome assessment for oral health related quality of life (OHQOL) in young and middle-aged adults in Japanese workers. Further studies will be needed to evaluate an intervention such as worksite health promotion.
authors.affiliation: Department of Clinical Epidemiology, Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan, Kitakyushu, Japan. r-ochide@med.uoeh-u.ac.jp
authors.forename: R
authors.initials: R
authors.lastname: Ide
authors.forename: T
authors.initials: T
authors.lastname: Mizoue
authors.forename: R
authors.initials: R
authors.lastname: Yamamoto
authors.forename: M
authors.initials: M
authors.lastname: Tsuneoka
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D001294:Attitude to Health; D003430:Cross-Sectional Studies; D003627:Data Interpretation, Statistical; D004435:Eating / Q000502:physiology; D005260:Female; D006304:Health Status; D006801:Humans; D007398:Interpersonal Relations; D007564:Japan; D008297:Male; D008875:Middle Aged; D009909:Oral Health; D017063:Outcome Assessment, Health Care; D010146:Pain / Q000145:classification; D011788:Quality of Life; D015203:Reproducibility of Results; D012919:Social Behavior; D013060:Speech / Q000502:physiology; D011795:Surveys and Questionnaires