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Table 1 Overview of the assessment instruments used throughout each stage of the study

From: An Internet-based intervention for eating disorders consisting of automated computer-tailored feedback with or without supplemented frequent or infrequent support from a coach: study protocol for a randomized controlled trial

Assessment Screening T0: Baseline Weekly monitoring: even weeks Weekly monitoring: uneven weeks T1: Post-intervention T2: 3-month follow-up T3: 6-month follow-up2
Weight Concern Scale (WCS) X - - - - - -
Short Evaluation of Eating Disorders (SEED) X X - - X X X
Short Evaluation of Eating Disorders II (SEED-II) - - X X - - -
Demographics and other information - X - - - - -
Monitoring questionnaire - - X X - - -
Patient Health Questionnaire 4 (PHQ-4) - X - X X X X
Perseverative Thinking Questionnaire (PTQ) - X - X X X X
Eating Disorder Examination Questionnaire (EDE-Q) - X - - X X X
Self-stigma of seeking help - X - - X X X
Self-esteem, mastery and support - X - - X X X
Eating Disorder-related Quality of Life (ED-QOL)   X - - X X X
Motivation to change - X - - X X X
Session Rating Scale (SRS) - - X1 - - - -
User satisfaction questionnaire - - - - X2 - -
Attrition follow-up question - - X3 X3 X3 X3 X3
Help-seeking attitudes and behavior questionnaire - - - - X X X
Quality of life (EuroQol: EQ-5D) - X - - X X X
Trimbos/iMTA questionnaire for costs associated with psychiatric illness - X - - X X X
  1. 1Only asked after participants’ first week of participation.
  2. 2Not sent to participants who are randomized to the waiting list control condition.
  3. 3Sent to participants who fail to complete the monitoring assessment, or the T1, T2 or T3 assessment, respectively.