Graded Exposure Therapy for Fear Avoidance Behaviour After Concussion (GET FAB)

Concussions are very common. Although many people recover well from concussion, some will have persistent symptoms and difficulties with daily activities. How people cope with their symptoms following concussion powerfully influences their recovery. Fear avoidance behaviour is a particularly unhelpful approach to coping, in which people perceive their pre-injury activities as unnecessarily dangerous and take great care to avoid overexertion and overstimulation. The investigators developed and pilot tested a behavioural therapy, called graded exposure therapy, to reduce fear avoidance behaviour. Our preliminary work suggested that graded exposure therapy was acceptable to patients with concussion and possibly beneficial for their recovery. The GET FAB after concussion study will assess the effectiveness of graded exposure therapy.

GET FAB is a multisite randomized controlled trial designed to evaluate a behavioural treatment (graded exposure therapy) for adults with persistent symptoms after concussion. Participants in this study will be recruited from a network of concussion clinics in Canada. This study follows from the investigators' prior work establishing that (1) fear avoidance behaviour is a risk factor for poor concussion outcome, (2) graded exposure therapy reduces fear avoidance behaviour, and (3) graded exposure therapy is perceived as credible and is well-tolerated by patients with persistent post-concussion symptoms. Participants will be assigned at random (in a 1:2:2 ratio) to receive enhanced usual care, graded exposure therapy group, or another therapy that might have similar benefits (prescribed aerobic exercise). The investigators hypothesize that patients who participate in graded exposure therapy will have reduced fear avoidance behaviour and improved daily functioning compared to other treatment conditions and this difference will be greatest for patients who enter the study with high fear avoidance behaviour.

Participants will be blinded to the study hypotheses and treatment arms, but not to the type of intervention they are receiving. Outcome assessors will be blinded to participants' treatment assignments.

Graded exposure therapy is delivered by a psychologist over 12 individual (1:1) secure videoconference sessions. The core active ingredient is graded situational exposure to foster habituation and challenge beliefs that the avoided activities are dangerous. Homework exercises involve planned exposure exercises in the home and community to support generalization.

Participants will be asked to complete 30 minutes of aerobic exercise on 5 days/week for a 12-week period. Participants select the mode (e.g., swimming, jogging, bicycling) and location of exercise (e.g., outdoors, a gym or community centre, at home). The initial exercise intensity target will be based on the Buffalo Concussion Bike Test. The target progression will be 3-5 beats per minute every two weeks.

Usual care (education about concussion from the website: concussion.vch.ca/) will be enhanced through text message support.

World Health Organization Disability Assessment Schedule (WHODAS) 2.0 12-item: interviewer version: Change.

Inclusion Criteria: Sustained a concussion according to the World Health Organization Neurotrauma Task Force definition between 1 and 12 months ago; Fluent in English; Access to a computer, tablet, or smartphone with internet capability; 3 or more moderate-severe symptoms on the Rivermead Postconcussion Symptom Questionnaire. Exclusion Criteria: Medical contraindication to aerobic exercise (cardiac disease, chest pain with exertion, acute bone/joint/soft tissue injury aggravated by exercise); Beta-blocker medication use; Involved in personal injury litigation for the concussion; Fail performance validity testing.

Silverberg ND, Cairncross M, Brasher PMA, Vranceanu AM, Snell DL, Yeates KO, Panenka WJ, Iverson GL, Debert CT, Bayley MT, Hunt C, Baker A, Burke MJ; Canadian Traumatic Brain Injury Research Consortium (CTRC). Feasibility of Concussion Rehabilitation Approaches Tailored to Psychological Coping Styles: A Randomized Controlled Trial. Arch Phys Med Rehabil. 2022 Aug;103(8):1565-1573.e2. doi: 10.1016/j.apmr.2021.12.005. Epub 2021 Dec 28.