The purpose of this study was to look at the reliability and validity of the Illness Identity Questionnaire (IIQ) in adolescents with celiac disease (CD), describe their illness identity characteristics, and look at the relationships between illness identity and self-reported participation in food-related activities and quality of life. Adolescents with CD were recruited using social media interest groups for this cross-sectional study. The IIQ, the CD Children’s Activities Chart (CD-Chart), and the Pediatric Quality of Life Inventory were all completed online by participants (PedsQL). Internal dependability was developed for IIQ goods as well as its four components. The positive and negative components varied substantially, t(90) = 11.45, P 0.001, d = 1.98. Positive feelings outweighed negative ones. The overall IIQ was shown to be favourably related to the CD-Chart quantity of activities and enjoyment, as well as the PedsQL social scale.

The IIQ determined that the reliability and validity were satisfactory. Overall, the teenagers with CD had a more positive and adaptive disease identity profile than a negative one. The IIQ can help us understand the developmental state of disease identification throughout the important transition from adolescent to adulthood.