NCT02215187.

Methods	Parallel randomised trial
Participants	Caregivers of people with traumatic brain injury (TBI) Inclusion Criteria: age ≥ 19 years old, meets study project definition of a military caregiver, documentation or determination of an Operation Iraqi Freedom/Operation Enduring Freedom (OIF/OEF) deployment‐related TBI Service member will have presented to a Veterans Administration Medical Center (VAMC) or military medical centre, English‐speaking, has access to a telephone for the administration of measures and/or intervention calls, has no significant cognitive or communication problems that might significantly interfere with adequately understanding information or talking on the telephone which will be determined by the clinical judgment of the person consenting the participant.
Interventions	Title of the intervention: Problem‐Solving Training (PST) Aim: To evaluate the impact of a telehealth‐based, cognitive behavioural therapy (CBT) intervention (problem‐solving training: PST) for adult informal military family/friend caregivers of OIF/OEF service members with a deployment‐related TBI Interventionist(s): no details provided Duration: 6 weeks (one hour per week) Content: Problem‐Solving Training (PST) is a cognitive‐behavioural intervention. PST consists of education related to problem‐solving skills/problem‐solving model and application to caregiving and managing caregiver‐related problems. Standardisation: no details provided Comparison group: Sham Comparator: Attention control/social contact control. Health education (non‐skill focused).
Outcomes	Patient Health Questionnaire‐9 (PHQ‐9) Data collection time points are baseline and post‐program (3 months follow‐up).
Notes	The type of interventionist i.e. professional/non‐professional was not stated. The study is ongoing and the final data collection date for the primary outcome measure was September 2017.