A qualitative study of persons with persistent postconcussion symptoms and clinicians with concussion expertise to inform the development of a concussion-specific questionnaire.

Capacity is fundamental to measuring limitations in functioning based on symptom threshold and time to recovery. The impact of contextual factors on functioning needs to be considered on a continuum from barrier to facilitator. These findings provide the basis for the development of a concussion-specific questionnaire.Implications for RehabilitationClinicians should explore with their patients limitations across all areas of functioning.Clinicians should explore and address support and relationships, attitudes of others, access to affordable and high-quality healthcare, coping strategies, and a patient's own knowledge of concussion as these influence functioning.Current guidelines recommend a symptom-based approach to concussion management, whereas persons with concussion emphasize the importance of measuring functional capacity.Capacity is defined as the length of time one can perform a task before symptom onset, primarily fatigue.Currently, no concussion-specific measure of functioning exists.