It's how I am . . . it's what I am . . . it's a part of who I am: A narrative exploration of the impact of adolescent-onset chronic illness on identity formation in young people.

In Western society, identity formation is argued to be one of the key developmental tasks of adolescence. Despite implications for adolescent development, research into chronic illness (CI) onset during this period has been notably sparse. This study aimed to explore how diagnosis impacts on the developmental tasks of adolescence, what role adolescent-onset CI plays in identity formation, and how adolescents incorporate the diagnosis into their identity using a narrative analysis. Individual semi-structured interviews were carried out with eight young people aged 14 to 19years who lived with a diagnosis of a CI diagnosed between the ages of 12 and 16 years. Five core narrative themes emerged: walking a different path, tolerating contradiction, a changed interface with others, locating power and a fluid relationship. Narratives were considered to have been influenced by factors such as the interview context and dominant social narratives concerning health and illness. Adolescent-onset CI was found to have a significant, though not exclusively negative, impact on developmental tasks. The findings are discussed in relation to existing literature and potential clinical implications.