Development and Validation of an Oral Lichen Planus Daily Management Questionnaire: A KAP Evaluation

OBJECTIVES: The aim of this study was to develop and validate a questionnaire for assessing the knowledge, attitude and practice (KAP) related to the daily management of oral lichen planus (OLP). MATERIALS AND METHODS: A 25-item questionnaire with three dimensions was developed. Using convenience sampling, 136 OLP patients from a tertiary hospital in Guangdong Province (December 2023-April 2024) completed the survey. Among them, 30 patients were retested 2-4 weeks after the initial survey, during which no participants received any OLP-related health education interventions. Reliability was evaluated using Cronbach's α coefficient, split-half reliability, and test-retest reliability, while validity was assessed via the content validity index, exploratory factor analysis, and confirmatory factor analysis. RESULTS: The questionnaire showed strong reliability (Cronbach's α = 0.923; test-retest reliability = 0.909) and validity (content validity index = 0.93). Factor analysis identified three dimensions, explaining 60.84% of the total variance, with adequate model fit indices. CONCLUSIONS: This validated 25-item questionnaire (covering knowledge, attitude, and practice dimensions) serves as an initial, reliable measure of OLP-related knowledge, attitudes, and self-management practices with acceptable construct validity in a single-center sample.