Abstract
Objective
To translate and cross-culturally adapt the Malocclusion Impact Questionnaire (MIQ) into Chinese and to assess the psychometric properties of the Chinese version of the MIQ (MIQ/C) for use among adolescents with malocclusion in China.
Materials and method
First, the MIQ/C was developed according to international guidelines. Then, the MIQ/C was filled out by 536 adolescents between 10 and 16 years of age. This study used exploratory factor analysis (EFA), confirmatory factor analysis (CFA), convergent validity, internal consistency, and test-retest reliability to evaluate the psychometric properties of the MIQ/C.
Results
Following EFA, three domains were extracted, accounting for 65.950% of the total variance. The CFA results showed that the fit indices of each factor in the three-factor model all reached the standard (chi-square/DF = 2.591, GFI = 0.919, TLI = 0.926, CFI = 0.928, RMSEA = 0.076). The scale evidenced a good relationship with the two global questions, indicating good convergent validity. The Cronbach alpha value and the intraclass correlation coefficients (ICC) value of the MIQ/C were 0.929 and 0.893, respectively.
Conclusion
The MIQ/C demonstrated good reliability and validity and can be further studied and applied in Chinese adolescents with malocclusion.
Clinical relevance
The MIQ/C can be applied to assess the psychosocial impact of malocclusion among Chinese adolescents.
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Acknowledgments
The authors wish to thank all adolescents who participated in the study.
Funding
This study was supported by the Program for Innovation Team Building at Institutions of Higher Education in Chongqing in 2016, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education.
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Li, My., He, Sl. & Wang, Jh. Validation of the Chinese version of the Malocclusion Impact Questionnaire (MIQ). Clin Oral Invest 25, 2419–2427 (2021). https://doi.org/10.1007/s00784-020-03565-1
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DOI: https://doi.org/10.1007/s00784-020-03565-1