title: A Korean version of the Oral Impacts on Daily Performances (OIDP) scale in elderly populations: validity, reliability and prevalence.
abstract: BACKGROUND
  This study aimed to develop a Korean version of the OIDP index for elderly people and to assess the levels of sociodental impacts in an older Korean population.
  
  
  METHODS
  The OIDP index for elderly people was cross-culturally adapted from English into Korean and then the derived instrument was tested for reliability and validity. The study population was elderly (65+ year-old) residents of Gangneung City, South Korea. Twenty two of the 222 senior day centres were randomly selected.
  
  
  RESULTS
  687 people were invited and 668 participated in the study (response rate: 97.2%). The standardized Cronbach's alpha coefficient was 0.85. The OIDP related significantly with different subjective measures of oral and general health (p < 0.001). 62.9% of the people had oral impacts relating to one or more performances, with eating food being the most frequently affected performance (47.6%). More than 70% of people with oral impacts had up to 3 performances affected by oral health conditions.
  
  
  CONCLUSIONS
  The Korean OIDP index showed satisfactory validity and internal consistency reliability, confirming its appropriateness for use among older Korean people. The prevalence of oral health related impacts was high. Future studies should focus on the test-retest reliability and the sensitivity to change of the Korean OIDP.
authors.affiliation: Department of Preventive and Public Health Dentistry, Kangnung National University, Gangneung, Republic of Korea. feeljsh@kangnung.ac.kr
authors.forename: Se-Hwan
authors.initials: SH
authors.lastname: Jung
authors.forename: Jae-In
authors.initials: JI
authors.lastname: Ryu
authors.forename: Georgios
authors.initials: G
authors.lastname: Tsakos
authors.forename: Aubrey
authors.initials: A
authors.lastname: Sheiham
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D003753:Dental Health Surveys; D005260:Female; D006301:Health Services Needs and Demand; D006801:Humans; D007723:Korea; D008297:Male; D009909:Oral Health; D011594:Psychometrics / Q000379:methods; D011788:Quality of Life / Q000523:psychology; D015203:Reproducibility of Results; D012959:Socioeconomic Factors; D018709:Statistics, Nonparametric; D011795:Surveys and Questionnaires