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Table 2 Schedule of enrolment, interventions, and assessments according to SPIRIT

From: Supported online cognitive behavioural therapy for bulimia nervosa: a study protocol of a randomised controlled trial

  TIMEPOINT** STUDY PERIOD
Enrolment Allocation Post-allocation
 − T1 0 T0 Weekly monitoring T1 T2 T3
Enrolment Eligibility screen X       
GP Clearance X       
Informed consent X       
Allocation   X      
Interventions Clinician-supported BEeT     
Pure self-help BEeT     
WLC   
Assessments Demographics    X     
General mental health    X     
Self-harm and suicidality risk assessment    X X X X X
Eating disorder examination questionnaire (EDE-Q)    X   X X X
Eating disorder examination questionnaire-short (EDE-QS)     X    
Kessler psychological distress scale (K10)    X X X X X
Eating disorder quality of life questionnaire (EDQOL)    X   X X X
Three-factor eating questionnaire (TFEQ)    X   X X X
Young schema questionnaire    X   X X X
Body mass index (BMI)    X X1 X X X
European quality of life-5 dimensions-5 levels (ED-5D-5L)    X   X X X
Evaluation of external health services utilised    X   X X X
Implementation surveys      X   
Working alliance inventory-short revised (WAI-SR)2      X   
Working alliance inventory for online interventions-short form (WAI-TECH-SF)      X   
  1. **T0 = baseline assessment, T1 = 12 week assessment (post-intervention), T3 = 24 week assessment (3 month follow up), T3 = 36 week assessment (for WLC only)
  2. 1BMI measured in fourth week of participation. Also measured weekly from fifth to tenth week for participants where rapid weight loss is indicated
  3. 2Only administered to clinician-supported BEeT participants