Questionnaire Development and Exploratory Validation for Assessing Romanian Dental Students’ Knowledge and Attitudes Toward Smoking and Periodontal Health

Introduction: Smoking is a major modifiable risk factor for periodontal disease, while perceptions, knowledge, and attitudes may influence smoking-related behaviors and preventive practices. The aim of this study was to develop and perform an exploratory validation of a questionnaire assessing these dimensions in relation to periodontal health. Methods: A cross-sectional survey was conducted using a structured, self-administered online questionnaire comprising 31 items. Internal consistency was evaluated using Cronbach’s alpha coefficient, and construct validity was assessed through exploratory factor analysis using principal component analysis with Varimax rotation. Results: Sixty-six complete questionnaires were included in the analysis. The overall internal consistency of the instrument was good (Cronbach’s alpha = 0.770). Reliability across individual domains ranged from acceptable to good. The Kaiser–Meyer–Olkin measure and Bartlett’s Test of Sphericity confirmed the suitability of the data for factor analysis. Conclusions: The questionnaire demonstrates acceptable psychometric properties for exploratory use and may serve as a preliminary tool for assessing smoking-related perceptions, knowledge, and attitudes in relation to periodontal health.