Table 1.
Overview of measures administered at each assessment interval
| Questionnaire | Aim | Baseline (T0) | Week 10 (T1) | Week 20 (T2) | Week 30 (T3) |
|---|---|---|---|---|---|
| Primary outcomes | |||||
| IDS-SR | Depression severity | x | x | x | x |
| MINI plus full | Diagnostic interview | x | x | ||
| MINI plus; Section A | x | x | |||
| EQ-5D-3L | Health-related QoL | x | x | x | x |
| SF-36 | Functional impairment | x | x | x | x |
| TiC-P | Health care utilization | x | x | x | x |
| Other variables of interest | |||||
| General patient characteristics | x | ||||
| A priori treatment preference | x | ||||
| Mastery Scale | Locus of control | x | x | x | x |
| WAI-SR | Therapeutic alliance | x | |||
| CCL-D | Depressive cognitions | x | x | x | |
| CSQ | Treatment satisfaction | x | |||
| SUS (bCBT only) | System usability | x | |||
bCBT: Blended Cognitive Behavioural Therapy; CCL-D: Cognition Checklist-Depression scale; CSQ: Client Satisfaction Questionnaire; EQ-5D-3L: EuroQol; IDS-SR: Inventory of Depressive Symptomatology, Self-Report version; MINI plus: Mini International Neuropsychiatric Interview Plus; QoL: Quality of Life; SF-36: 36-item Short Form Health Survey; SUS: System Usability Scale; TiC-P: Trimbos and iMTA questionnaire on Costs associated with Psychiatric illness; WAI-SR: Work Alliance Inventory-Short Revised.