Cross-cultural adaptation of PIDAQ questionnaire to evaluate the psychosocial impact of dental esthetics in Chilean adolescents with malocclusion

<b>Background:</b> The Psychosocial Impact of Dental Aesthetics Questionnaire (PIDAQ) is a useful index to assess aspects of malocclusion that impact individuals' oral health-related quality of life. This study aimed to perform cross-cultural adaptation of the PIDAQ questionnaire to the language of the Chilean adolescent population. <b>Methods:</b> We used the framework of the Guidelines for the Transcultural Adaptation Process of self-reports and the Manuals for a language inclusive for the transcultural adaptation of the PIDAQ. The instrument was tested with 34 Chilean adolescents with malocclusion between 11 and 17 years of age. We evaluated equivalence considering criterion, content, and construct validity according to COSMIN methodology and performed Cronbach's alpha statistical test. Twenty-three items in the questionnaire were tested according to how clear and understandable the questions were to the reader and according to a Likert scale graduated in: not at all clear, unclear, clear, or very clear. For temporal stability, we calculated intraclass correlation coefficients (ICC). <b>Results:</b> We obtained a more than acceptable reliability with a Cronbach's Alpha of 0.95 for the total questionnaire. The questions grouped according to the dimensions of dental self-confidence, social impact, psychological impact, and esthetic concern obtained a Cronbach's Alpha of 0.95, 0.95, 0.95 and 0.94, respectively. The questionnaire showed high temporal stability at the test-retest with a total Intraclass Correlation Coefficient of 0.91 (0.89-0.91). <b>Conclusion:</b> The cross-cultural adaptation of the PIDAQ questionnaire achieved equivalence with the original instrument and obtained reliability and content, and construct validity in Chilean adolescents.