Structural Validity of the Korean Version of Child Oral Health Impact Profile Using Confirmatory Factor Analysis
FOR IMMEDIATE RELEASE
IADR contact: Ingrid L. Thomas
+1.703.548.0066 or firstname.lastname@example.org
June 22, 2016
Seoul, Republic of Korea – Today at the 94th General Session & Exhibition of the International Association for Dental Research, researcher Hae-Young Kim, Korea University, Seoul, Republic of Korea, will present a study titled “Structural Validity of the Korean Version of Child Oral Health Impact Profile Using Confirmatory Factor Analysis.” The IADR General Session is being held in conjunction with the 3rd Meeting of the IADR Asia Pacific Region and the 35th Annual Meeting of the IADR Korean Division.
A structural validity reflecting the theoretical structure of a measurement needs to be supported by real data. Empirical support for the factor structure of the Child Oral Health Impact Profile (COHIP) has not been fully established. This study was designed to empirically evaluate the structural validity of the Korean version of Child Oral Health Impact Profile (COHIP-K) using confirmatory factor analysis (CFA) and then to assess whether any of the factors in the structure could be grouped into a simpler single second-order factor, that may support the use of an integrated summary COHIP score.
Data were collected through self-reported COHIP-K responses from a representative community sample of 2,236 Korean children aged eight to 15 years. Pre-planned models were implemented by confirmatory factor analysis and selected by comparison of model-fit. The whole dataset was divided into two and used for establishment of models and cross-validation, respectively. Mplus 7.0 program was used for confirmatory factor analysis.
When the theoretical five-factor model was assessed, a large inter-factor correlation of 0.92, unacceptably high for two independent factors, was found between Functional and School Environment subscales, therefore two factors were combined into one factor, resulting in a four-factor structure. The revised four-factor model showed a reasonable fit after permitting appropriate inter-factor correlations (CFI=0.899, TLI=0.899, RMSEA=0.048, and SRMR=0.045). Additionally, the second-order model with four sub-factors was reasonable with sufficient fit and showed equal fit to the revised four-factor model. A cross-validation procedure confirmed the appropriateness of the findings (CFI=0.910, TLI=0.901, RMSEA=0.045, and SRMR=0.043).
The researchers’ analysis empirically supported a four-factor structure of COHIP-K, a summarized second-order model, and the use of an integrated summary COHIP score.
This research is supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2010-0002761).
This is a summary of oral session #0103 titled “Structural Validity of the Korean Version of Child Oral Health Impact Profile Using Confirmatory Factor Analysis,” to be presented by Hae-Young Kim on Wednesday, June 22, 2016, 2:45 p.m. – 3 p.m. at the COEX Convention and Exhibition Center, Hall E3, as part of the session titled “Community Oral Health I.”
About the International Association for Dental Research
The International Association for Dental Research (IADR) is a nonprofit organization with nearly 10,500 individual members worldwide, dedicated to: (1) advancing research and increasing knowledge for the improvement of oral health worldwide, (2) supporting and representing the oral health research community, and (3) facilitating the communication and application of research findings. To learn more, visit www.iadr.org.