Consent, eligibility, and baseline
PTSS, Anxiety, psychiatric, Stress Disorder, Depression, Fatigue
DISORDER, RECURRENCE, DISORDERS
Parents provided consent via the Portal. Parents who registered interest in participation but did not provide consent, or opt out, within 2 weeks, were contacted to confirm interest in participation (maximum five reminders via telephone, SMS or e‐mail).Parents providing consent were contacted to organize a telephone eligibility interview with a licensed psychologist. Interviews included: (1) questions concerning eligibility criteria; with those eligible completing specific modules of the M.I.N.I., and; (2) questions concerning parent and child sociodemographic and clinical characteristics (Table Overview of measures taken at respective assessment time‐pointPortal/TelephoneWeekly process evaluation: Portal onlyPortal/TelephoneWeekly process evaluation: Portal onlyPortal/TelephoneWeekly process evaluation: Portal onlyPortal/TelephoneWeekly process evaluation: Portal onlyPortal/TelephoneWeekly process evaluation: Portal onlyAbbreviations: AAQ‐6, Acceptance and Action Questionnaire; BADS, Behavioral Activation for Depression Scale; EQ‐5D, EuroQol 5‐dimension questionnaire; FRHC, Fear of recurrence and serious health condition (structured questions); FSS, Fatigue Severity Scale; GAD‐7, Generalized Anxiety Disorder 7‐item scale; M.I.N.I., Mini‐International Neuropsychiatric Interview version 7.0.0; PCL‐5, Post‐traumatic Stress Disorder Checklist for DSM‐5; PCL‐C, adapted version of Post‐traumatic Stress Disorder Checklist‐Civilian version; PHQ‐9, Patient Health Questionnaire; PTSS, Post‐traumatic stress symptoms; SCS‐SF, Self‐Compassion Scale‐Short Form; TIC‐P, Treatment Inventory of Costs in Patients with psychiatric disorders.Eligible participants were enrolled and invited to an optional semi‐structured telephone interview with a licensed psychologist to explore concerns, needs, healthcare utilization, and productivity loss, alongside expectations on the trial and intervention. Participants gained access to the Portal assessment at baseline (Table 