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.