Study schedule
| Measure | Study period | |||||
| Screen 0–1 week | Pre 0 weeks | Weekly (iCT only) | Mid 0+6 weeks | Post 0+16 weeks | Follow-up 0+38 weeks (iCT only) | |
| Enrolment | ||||||
| Eligibility screen | x | |||||
| Provide study information | x | |||||
| Gain informed consent | x | |||||
| Online assessment | ||||||
| Dawba | x | |||||
| Interview | ||||||
| Demographic interview | ||||||
| CAPS-CA-5 | x | x | ||||
| CGAS | x | x | ||||
| Adolescent questionnaires | ||||||
| CPSS-5 | x | x | x | |||
| CRIES-8 | x | x | x | x | x | |
| RCADS-C | x | x | x | |||
| CPTCI | x | x | x | x | ||
| TMQQ | x | x | x | x | ||
| Rumination items | x | x | x | x | ||
| CHU-9D | x | x | x | |||
| Adverse events | x | x | x | |||
| Carer questionnaires | ||||||
| SDQ-P | x | x | x | |||
| RCADS-P | x | x | x | |||
| CA-SUS | x | x | x | |||
| Adverse events | x | x | x | |||
| Qualitative interviews | ||||||
| Adolescents | x | |||||
| Carers | x | |||||
| Therapists | x | |||||
CAPS-CA-5, Clinician Administered PTSD Scale for DSM-5: Child and Adolescent version; CA-SUS, Child and Adolescent Service Use Schedule; CGAS, Children’s Global Assessment Scale; CHU-9D, Child Health Utility Index 9D; CPSS-5, Child PTSD Symptom Scale for DSM-5; CPTCI, Child Post Traumatic Cognitions Inventory; CRIES-8, Children’s Revised Impact of Event Scale, 8-item version; DSM-5, Diagnostic and Statistical Manual of Mental Disorders; iCT, internet-delivered cognitive therapy; PTSD, post-traumatic stress disorder; RCADS-C, Revised Children’s Anxiety and Depression Scale—child version; RCADS-P, RCADS—parent version; SDQ-P, Strength and Difficulties Questionnaire—parent version; TMQQ, Trauma Memory Quality Questionnaire.