Relapse of concussion symptoms in the context of premature return to learn and return to play: Comparative analysis of 2006 to 2011 and 2011 to 2016.

Objective: To determine whether the proportion of sport-related concussion (SRC) cases among student athletes that resulted in a relapse of their symptoms due to premature return to play (RTP) or premature return to learn (RTL) has changed compared with a prior (2006 to 2011) study.

Design: Retrospective cohort study of electronic medical record charts from a 5-year period (2011 to 2016) compared with previous data.

Setting: A sport and exercise medicine physician's office-based practice in Ontario.

Premature return to play and return to learn after a sport-related concussion: physician's chart review.

Objective: To determine what proportion of patients experience an exacerbation of their symptoms as a result of premature return to play (RTP) and return to learn (RTL) following sport-related concussions.

Design: Retrospective study of electronic medical records from the office-based practice of one family and sport medicine physician who had systematically provided recommendations for cognitive and physical rest based on existing consensus recommendations. Two blinded authors independently reviewed each chart, which included Sport Concussion Assessment Tool (SCAT) and SCAT2 symptom self-report forms to determine whether an athlete had returned to play or learn prematurely.