title: Development and validation of a condition-specific measure for chronic periodontitis: Oral health impact profile for chronic periodontitis.
abstract: OBJECTIVE
  The aim of this study was to develop and validate the first condition-specific tool to assess oral health-related quality of life (OHRQoL) impairment in association with chronic periodontitis and to use it as an outcome measure in clinical trials.
  
  
  METHODS
  Twenty-three potential items were developed using a combined method consisting of a literature review, semi-structured patient interviews (n = 20) and expert panel 1. Subsequently, item selection was carried out by means of qualitative content analysis and quantitative classical test theory (CTT) with 110 patients and expert panel 2. Consequently, 18 items were selected and included in the final oral health impact profile for chronic periodontitis (OHIP-CP) instrument. The validity and reliability of the OHIP-CP were then examined.
  
  
  RESULTS
  A total of 238 patients participated in the validation phase of OHIP-CP. The final 18-item questionnaire was shown to have a three-domain structure. The three components "pain and functional limitation", "psychological discomfort" and "psychological disability and social handicap" explained 49.9%, 9.9%, and 6.2% of the variance, respectively, together accounting for 66.1% of the variance. In addition, the OHIP-CP was shown to be valid in distinguishing patients with varying severity of chronic periodontitis. For the convergent validity, the reported impact of chronic periodontitis based on the OHIP-CP significantly correlated with the global oral health rating. All of its three domains were found to have good levels of internal consistency with Cronbach's alpha >.7, and excellent test-retest reliability.
  
  
  CONCLUSIONS
  The OHIP-CP is the first condition-specific OHRQoL instrument for patients with chronic periodontitis. This short, reliable and valid questionnaire may serve as a valuable tool in future clinical trials.
authors.affiliation: College of Stomatology, Chongqing Medical University, Chongqing, China.|Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China.|Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China.
authors.forename: Songlin
authors.identifier: http://orcid.org/0000-0001-6196-3626
authors.initials: S
authors.lastname: He
authors.affiliation: College of Stomatology, Chongqing Medical University, Chongqing, China.|Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China.|Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China.
authors.forename: Jinhua
authors.initials: J
authors.lastname: Wang
authors.affiliation: College of Stomatology, Chongqing Medical University, Chongqing, China.|Center for Biomedical Materials and Tissue Engineering, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China.|Department of Oral and Maxillofacial Surgery, Laboratory of Interdisciplinary Studies, Peking University School and Hospital of Stomatology, Beijing, China.
authors.forename: Shicheng
authors.initials: S
authors.lastname: Wei
authors.affiliation: College of Stomatology, Chongqing Medical University, Chongqing, China.|Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing, China.|Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Chongqing, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Ji
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D055113:Chronic Periodontitis / Q000503:physiopathology* / Q000523:psychology*; D003729:Dental Care; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009909:Oral Health; D010512:Periodontal Index; D011788:Quality of Life; D015203:Reproducibility of Results; D018434:Sickness Impact Profile; D011795:Surveys and Questionnaires; D055815:Young Adult
keywords: chronic periodontitis; development; oral health-related quality of life; reliability; validity