Adaptive, Stepped-Care for Cancer-Related PTSD Symptoms in HCT Survivors: Results From a SMART Trial
In brief
Escalating to therapist CBT after a digital app yields biggest PTSD drop
In 477 hematopoietic cell transplant survivors with PTSD, about 60% improved after a 4-week self-guided app, but the app alone was no better than usual care. Patients who did not respond and were stepped up to therapist-delivered CBT showed the greatest and most lasting reductions in PTSD, depression, and anxiety. The findings support using digital tools as a first step, reserving intensive psychotherapy for non-responders.
- Journal
- Psycho-oncology (Q1)
- Published
- 1 August 2026
- Study design
- Randomized controlled trial
- Evidence level
- Level 1, High (CEBM 1b)
- Authors
- Sophia K Smith, Eric Kuhn, Tamara J Somers, Eric Laber, Cole Manschot, Anthony D Sung, et al.
- PMID
- 42565481
- DOI
- 10.1002/pon.70554
Why clinicians should know about it
- Picked for Emergency Medicine (top studies of the week, 9 August 2026).
- Picked for Transplantation (top studies of the week, 9 August 2026): Recent Transplantation research from a high-quartile journal
Abstract
OBJECTIVE: Cancer-related posttraumatic stress disorder (PTSD) is prevalent among hematopoietic cell transplantation (HCT) survivors, yet access to evidence-based care is limited. This study evaluated adaptive, stepped-care treatment sequences for PTSD symptoms using a Sequential Multiple Assignment Randomized Trial (SMART), comparing digital and therapist-delivered interventions. METHODS: HCT survivors (N = 477), 1-5 years post-transplant, with probable or subthreshold PTSD, were randomized to the Cancer Distress Coach (CaDC) app or Usual Care. At Week 4, non-responders (i.e., < 5-point PCL-5 reduction) were re-randomized to CaDC + Coaching or therapist-delivered cognitive behavioral therapy for PTSD (CBT-PTSD). PTSD symptoms (primary outcome), depression, and anxiety were assessed at baseline, Week 4, Month 3 (primary endpoint), and Month 6. RESULTS: Both initial treatment groups demonstrated symptom reductions at Week 4 with no significant between-group differences; approximately 60% met early response criteria. By Month 3, outcomes reflected treatment escalation rather than direct comparison of initial interventions. Regimen-level analyses demonstrated differences across adaptive sequences for PTSD at Months 3 and 6, and for depression and anxiety at Month 3 (global p-values ≤ 0.018). Regimens escalating to CBT-PTSD were associated with greater and more sustained reductions than those escalating to CaDC + Coaching. The sequence initiating with CaDC and escalating to CBT-PTSD produced the largest effects. CONCLUSIONS: Although a self-guided digital intervention did not outperform Usual Care initially, adaptive stepped-care strategies that triage early responders and escalate non-responders to therapist-delivered CBT-PTSD were associated with the greatest reductions in symptoms. Digital tools may function as entry points within stepped-care models to allocate higher-intensity psychotherapy. TRIALS REGISTRATION: ClinicalTrials.gov, NCT04058795, registered 8/16/2019.
Abstract as published, via PubMed.
For healthcare professionals. The summary is generated by AI from the published abstract, and the evidence level is assigned automatically from the study design on the Oxford CEBM hierarchy. Neither is medical advice. Read the full paper before changing practice.