A Mixed Method Systematic Review Into the Impact of ED Treatment in Autistic People and Those With High Autistic Traits.

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Our understanding of the impact of eating disorders (ED) treatment in Autistic people remains elusive. Research has begun to explore ED treatment outcomes and experiences in this population, however current understandings are poorly integrated. The current review therefore sought to explore the impact of ED treatment on Autistic people and those with higher Autistic traits. A convergent, segregated approach was used, independently evaluating quantitative then qualitative studies before integrating findings into a coherent narrative synthesis. Autistic people and people with higher Autistic traits report poorer experiences of treatment and may be at increased risk of inpatient admission and prolonged inpatient treatment, possibly explained by difficulties with treatment timeframes and a lack of autism-informed support. Both groups reported similar improvements in ED symptoms and BMI. Higher rates of psychosocial difficulties pre-and post-treatment were reported in those with higher Autistic traits, and emotion-focused interventions were felt to be particularly relevant to Autistic presentations of EDs. Concerns were reported as to how well aligned group-based programs and cognitive-based interventions are for Autistic individuals and those reporting higher Autistic traits. Future research in diagnosed autism samples is urgently needed to develop a more robust understanding of Autistic outcomes and experiences. Review findings demonstrate the need for increased understanding of ED presentations and the possible need for treatment adaptations, for Autistic people or those with higher Autistic traits.