The Influence of Timing of Reporting and Clinic Presentation on Concussion Recovery Outcomes: A Systematic Review and Meta-Analysis.

BACKGROUND

Identifying risk factors for prolonged recovery following concussion can assist clinicians with appropriate management strategies. It is thought that athletes who continue to participate following a hit to the head or body may take longer to recover following a concussion diagnosis.

OBJECTIVE

To systematically review the body of literature regarding the effect of delayed reporting and delayed presentation to medical providers on concussion recovery times.

DESIGN

Systematic review with meta-analysis.

DATA SOURCES

PubMed, Ovid Medline, SPORTDiscus, Cochrane Central Register of Controlled Trials and hand searches of reference lists. All the searches were performed in April 2020.

ELIGIBILITY CRITERIA FOR SELECTED STUDIES

Studies included an investigation of immediate versus delayed reporting or early versus late presentation following a concussion, were published in the past ten years, and were level 4 evidence or higher.

RESULTS

12 studies were included. Patients who continued play or delayed reporting their concussion had significantly longer recovery times (standardized mean difference = 0.36 days (95%CI 0.066, 0.662) than those who immediately reported or were removed from play (p = 0.017). Expressed in raw scores, those who immediately reported recovered in 5.4 days (95% CI - 10.14, - 0.75) fewer than delayed reporters. Comparable results were found for post-concussion symptom scores (p = 0.034) with immediate reporters demonstrating lower symptom severity scores. Our qualitative synthesis found patients who presented earlier to a concussion specialist tended to recover faster than those who presented later.

CONCLUSIONS

Patients who delayed reporting or continued play had longer recovery times compared to their immediately-reporting peers. Providers should ask concussion patients approximately how long they waited to report their injury, and also focus educational efforts on encouraging immediate reporting of concussion.