The study has implications for theory surrounding AN development, which currently proposes a key role for anxiety disorder pathology, and not transdiagnostic processes such as worry. Findings have relevance for future prevention interventions. The study may indicate factors that predict risk of later AN, allowing for interventions to be targeted towards those most at risk (i.e. indicated interventions). Findings may also inform of modifiable risk factors in AN prevention. It is notable that current AN prevention efforts largely do not seek to address anxiety disorder pathology or worry.