Efficacy of an internet-based cognitive-behavioral intervention for long-term survivors of pediatric cancer: a pilot study.

Purpose: Long-term survivors of pediatric cancer have an increased risk of post-traumatic stress symptoms (PTSS) and dysfunctional anxiety. However, there is a lack of evidence-based psychotherapy tailored to the needs of this target group. In this single-arm pilot study, an Internet-based psychological intervention ("Onco-STEP") for adolescent and young adult survivors was developed, and its efficacy in reducing PTSS and anxiety was evaluated.

Methods: Former patients of pediatric cancer older than 15 years manifesting clinically relevant PTSS or anxiety were eligible. The cognitive-behavioral treatment consists of ten writing sessions and comprises two modules: the first aiming to reprocess the traumatic cancer-related experiences and the second aiming to build coping strategies with current cancer-related fears. Treatment was delivered via written messages on a secure Internet platform. Outcomes were assessed by the Post-traumatic Stress Diagnostic Scale, the Hospital Anxiety and Depression Scale, and the Fear of Progression/Relapse Questionnaire.

Results: A total of 20 participants completed the intervention (mean age 27.3 ± 4.8 years at study; 13.8 ± 4.7 years since diagnosis; 70 % female). PTSS, anxiety, and fear of progression/relapse significantly declined at the end of the intervention, with pre-post effect sizes of 0.63, 0.74, and 0.48. In addition, we found a significant decrease in symptoms of depression. Except for the improvement in depression, all effects were sustained 3 months after the end of treatment.

Conclusions: The results show that the intervention is efficacious in reducing symptoms of post-traumatic stress and anxiety. Onco-STEP is a promising new way to treat young adult long-term survivors of pediatric cancer with late psychological effects. Future efforts need to focus on investigating specific evidence of the intervention in a randomized controlled trial.