DISCUSSION
cancer, depression, depressive, anxiety
CANCER
The ENGAGE feasibility trial demonstrated it is possible to recruit and retain parents of children treated for cancer into a single‐arm feasibility trial of an internet administered, guided, LICBT based, self‐help intervention. In summary: (1) 12.0% of invited parents consented and 11.0% of invited parents were enrolled, exceeding progression criteria of ≥9%; (2) 24.0% dropped out of the study, and 23.6% dropped out of the intervention, bettering progression criteria of ≤30%; (3) missing items per questionnaire ranged from 0.01% to 3.9%, remaining under ≤10% for all measures, bettering progression criteria; (4) percentage of participants completing assessments ranged from 65.6% to 98.7%, bettering progression criteria of ≥70% for M.I.N.I interviews at all time‐points and Portal assessments at baseline, and marginally under progression criteria of ≥70% for Portal assessments at post‐treatment and follow‐up; (5) intervention adherence was 47.9%, marginally under progression criteria of ≥50%; and (6) no participant reported a substantial negative consequence related to the study and/or intervention, meeting progression criteria. This study was not designed to detect differences in parental depression or anxiety at follow‐up, however reductions in depressive and anxiety symptoms were observed via visual inspection.