Table 1 Study schedule of enrolment, allocation and assessments

  Assessor checklist (eligibility screen)

X

  Intended treatment plan

X

  Informed consent

X

  Allocation

X

  Demographics

X

  Body mass index (BMI)

X

X

X

X

X

  Eating Disorder Examination interview (EDE) [58]

X

X

X

  Eating Disorder Examination Questionnaire (EDE-Q) [59]

X

  Eating Disorder Examination Questionnaire Short (EDE-QS) [60]

X

X

X

X

  Autism Spectrum Quotient (AQ-10) [61]

X

  Depression, Anxiety and Stress Scales-Version 21 (DASS-21) [62]

X

X

X

X

  Obsessive Compulsive Inventory-Revised (OCI-R) [63]

X

X

X

X

  Clinical Impairment Assessment (CIA) [64]

X

X

X

X

  Multidimensional Perceived Social Support Scale (MSPSS) [65]

X

X

X

X

  Work and Social Adjustment Scale (WSAS) [66]

X

X

X

X

  UCLA Loneliness Scale (Version 3) [67]

X

X

X

X

  Motivational rulers (willingness and readiness to change)

X

X

X

X

  Visual Analogue Scale (VAS) assessing treatment acceptability

X

X

X

X

  Visual Analogue Scale (VAS) assessing treatment expectations

X

  Perceived Coercion Scale - Adapted (PCS) [68]

X

X

  Therapeutic Environment Scale (TESS) [69]

X (at 3-months only)

  Health-related Quality of Life (EQ-5D-5L) [70]

X

X

X

X

  Adult Service Use Schedule (AD-SUS), designed for mental health populations [71, 72] and modified for AN.

X

X

X

X

  Covid-19 diagnosis and symptom checklist

X

X

X

X

  Informed consent

X

  Demographics

X

  Eating Disorder Symptom Impact Scale (EDSIS) [73]

X

X

X

X

  Depression, Anxiety and Stress Scales-Version 21 (DASS-21) [62]

X

X

X

X