Diagnosis Identity Perception in Adolescents with ADHD and Its Relationship to Executive Functions, Self-Management, and Quality of Life

<b>Background/Objectives</b>: This study aimed to describe how adolescents with attention-deficit/hyperactivity disorder (ADHD) perceive their diagnosis identity and examine its correlation with executive functions (EFs), self-management abilities, and quality of life (QoL). Methods: A total of 66 adolescents with ADHD, aged 12 to 18 years (<i>M</i> = 15.21, <i>SD</i> = 1.84), completed self-report questionnaires, including the Illness Identity Questionnaire, Behavior Rating Inventory of Executive Function, Self-Control and Self-Management Scale, and Pediatric QoL Inventory. We used ANOVA with Bonferroni post hoc tests to assess differences in diagnosis identity domains and Pearson correlations to examine correlations between diagnosis identity, EFs, self-management, and QoL. <b>Results</b>: Adolescents reported significantly higher ADHD <i>Acceptance</i> feelings compared to <i>Rejection</i>, <i>Engulfment</i>, and <i>Enrichment</i>, <i>F</i> (2.38, 149.89) = 32.41, <i>p</i> < 0.001. Total diagnosis identity score was strongly associated with self-management (<i>r</i> = 0.61, <i>p</i> < 0.001). While no significant correlations were found with overall EF or QoL, significant associations did emerge with their sub-scores. Regression analyses indicated that self-monitoring, social QoL, and self-evaluation together explained 45% of the variance in diagnosis identity. The <i>Engulfment</i> dimension of identity was a significant negative predictor of executive functioning (<i>R</i>² = 0.15), self-management (<i>R</i>² = 0.35), and QoL (<i>R</i>² = 0.17). <b>Conclusions</b>: Promoting a positive diagnosis identity may improve functional and emotional outcomes in adolescents with ADHD. In turn, better functional and emotional outcomes may help them embrace a diagnosis identity that is more positive.