Attention-deficit hyperactivity disorder as a moderator of the efficacy of family-based problem solving after pediatric traumatic brain injury.

ADHD status was determined solely by parent report, not structured diagnostic interviews or teacher ratings, which may misclassify symptoms. All outcome measures were collected post-injury, so there are no unbiased baseline ratings of pre-injury behavior to confirm the ADHD status. Data for the 18-month time point were only collected in one of the two original trials, resulting in a smaller sample and potentially less representative findings at this critical late follow-up. Non-white participants were less likely to complete the intervention than white participants, raising concerns about generalizability and cultural sensitivity. The study did not account for previous experience with behavioral interventions, which may have confounded the lack of benefit seen in the pre-injury ADHD group.

No conflicts of interest were declared.

Do not interpret the lack of immediate benefit in the pre-injury ADHD group as evidence that the intervention is ineffective for all ADHD subtypes. The post-injury ADHD group did show significant functional improvement, but only at the 18-month follow-up, indicating that the timing of ADHD onset relative to injury critically changes the expected trajectory of recovery.