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ORIGINAL RESEARCH Table of Contents   
Year : 2023  |  Volume : 34  |  Issue : 1  |  Page : 2-7
Development and psychometric validation of the orthodontic health literacy tool

1 Department of Periodontology, SIBAR Institute of Dental Sciences, Guntur, Andhra Pradesh, India
2 Department of Public Health Dentistry, Government Dental College and Hospital, Vijayawada, Andhra Pradesh, India
3 Department of Preventive Dental Sciences (Orthodontics), Faculty of Dentistry College, Majmaah University, Saudi Arabia
4 Department of Public Health Dentistry, SIBAR Institute of Dental Sciences, Guntur, Andhra Pradesh, India
5 Department of Orthodontics, SIBAR Institute of Dental Sciences, Guntur, Andhra Pradesh, India
6 Department of Orthodontics, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India

Correspondence Address:
Dr. Viswa Chaitanya Chandu
Department of Public Health Dentistry, Ground Floor, Government Dental College and Hospital, Vijayawada, Andhra Pradesh
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijdr.ijdr_268_21

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Introduction: Over the past few years, there has been increasing emphasis on context-specific health literacy. However, no such context-specific psychometric tools are available with regard to oral health literacy. The aim of this study was to develop and validate an Orthodontic Health Literacy Tool (Orth-HLT). Materials and Methods: After development of initial item pool, the items were assessed for content validity. The final tool consisted of 22 items in the four domains of functional, communicative, critical orthodontic health literacy, and orthodontic knowledge. Orth-HLT was administered to a convenience sample of 642 subjects. The data were subjected to exploratory and confirmatory factor analyses using IBM SPSS Version 20.0 software and IBM SPSS Amos 26.0, respectively. Pearson's correlation, independent samples t-test, and one-way analysis of variance were performed. Results: Orth-HLT demonstrated good face and content validity. The domain-specific internal consistency reliability values were optimal. Exploratory factor analysis on the items in all four domains resulted in a single factor solution. Four models were evaluated in the confirmatory factor analysis; the correlated factors model showed best model fit indices. Each domain of Orth-HLT showed moderate to strong positive correlation with Indian Oral Health Literacy Measure in Telugu indicating the convergent validity of the tool. Conclusion: Orth-HLT is the first context-specific oral health literacy tool and demonstrates strong psychometric properties, which could be used to evaluate orthodontic health literacy and articulate orthodontic health education materials in an informed manner.

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