Reading focus
Syllabus: Why Do Responses to Trauma Follow Different Paths?
Compare the primary intrusion outcome with the broader prevention claim and the proposed memory explanation.
Why you’re reading it. Finish by separating a randomized package comparison from proof of mechanism or long-term recovery.
A question to consider. Propose a follow-up study with one comparison that tests the mechanism and one outcome that tests whether everyday functioning improves.
Why this reading
An explanatory theory can inspire an intervention that targets a specific experience. This trial makes it possible to examine the distance between changing an outcome, identifying a mechanism, and preventing a broader disorder.
Before you read
A proof-of-concept trial tests an initial prediction under bounded conditions. A primary outcome is the prespecified main endpoint. An intervention package can differ from its control in several ways, even when allocation is randomized.
Read for
- Compare every ingredient of the intervention and control, including the reminder procedure, and distinguish blinded from unblinded assessment.
- Keep the first-week intrusion diary separate from other symptoms and later outcomes.
Consider afterwards
- What additional comparison and follow-up would be needed to test the proposed memory mechanism and the separate claim of preventing PTSD?
Editorial context
Seventy-one emergency-department patients were randomized after motor-vehicle accidents. Fewer first-week diary intrusions do not establish prevention of PTSD or isolate a memory mechanism. The linked published commentary challenges the prevention framing. A later small exploratory pilot used a different control and reported wide uncertainty. These are selected follow-ups, not a comprehensive assessment of current treatment evidence. Issue year: 2018; first online: 2017.