Two Weeks After Sports-Related Concussion, Most Patients Have Not Recovered

March 9, 2020 – Less than half of patients with sports-related mild traumatic brain injury (mTBI) achieve clinical recovery within two weeks after injury, reports a study in Clinical Journal of Sport Medicine. The journal is published in the Lippincott portfolio by Wolters Kluwer.

“This study challenges current perceptions that most people with a sports-related mTBI recover within 10 to 14 days,” write Stephen Kara, MBChB, of Axis Sports Medicine, Auckland, New Zealand. The findings also question the belief that children recover more slowly after sports-related concussion, and highlight the importance of early access to care after mTBI.

New Evidence on Expected Recovery Time After Sports-Related mTBI

The researchers analyzed recovery time in 594 patients with sports-related mTBI treated at their concussion clinic over a two-year period. (Mild traumatic brain injury and concussion refer to the same injury, but mTBI is the preferred scientific term.) All patients in the study were seen on average 8 days after injury. Seventy-seven percent were male. The average age was 20 years; about 7.5 percent of patients were children under age 12.

Patients were managed in a standardized assessment and management protocol, following current international guidelines (2017 Concussion in Sport Group [CISG] consensus statement). The protocol included an initial period of “relative rest” for 48 hours, with gradually increasing cognitive and physical activity. Patients were re-evaluated at 14 days post injury and then every two weeks until clinical recovery – defined by symptom scores, resolution of any abnormalities on initial examination, and demonstration of exercise tolerance.

At 14 days, mTBI symptoms had resolved in only 45 percent of patients – meaning that 55 percent did not yet have clinical recovery. In contrast, current CISG guidelines state that 80 to 90 percent of sports-related concussions resolve within seven to ten days.

Clinical recovery rate increased to 77 percent at four weeks after injury and 96 percent at eight weeks. Recovery time was similar across age groups; that’s in contrast to the CISG and other previous statements that children have longer times to clinical recovery after mTBI.

Recovery times were longer for female athletes, as well as for patients with certain “concussion modifiers” (history of migraine or mental health issues) previously linked to prolonged recovery. Patients who waited longer before their first visit to the concussion clinic were also at increased risk of prolonged recovery time: “For a seven-day increase in time to initial appointment, we could expect an approximate 15 percent increase in the number of days until clinical recovery,” according to the authors.

The study provides new insights into recovery times after sports-related mTBI, in a large group of patients receiving standardized, guideline-based care. The results suggest that less than half of patients have clinical recovery within 14 days.

“This rate of recovery is slower than described in previous CISG, and other position statements,” Dr. Kara and colleagues write. ” We believe that our data may reflect the natural recovery timeline for those with a sports-related mTBI.”

Dr. Kara and coauthors note that their standardized concussion protocol – including early active rehabilitation and equal access to medical resources – led to similar recovery times regardless of age or level of sport. They also found faster recovery time among patients who get medical attention more quickly after injury.

“Early access to care after mTBI leads to faster recovery,” Dr. Kara comments. “It enables physicians and therapists to empower patients to be actively involved in their recovery from both a physical and cognitive perspective, supported by a clinical recovery protocol.”

Click here to read “Less Than Half of Patients Recover Within 2 Weeks of Injury After a Sports-Related Mild Traumatic Brain Injury.”

DOI: 10.1097/JSM.0000000000000811

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About Clinical Journal of Sport Medicine

Clinical Journal of Sport Medicine is an international refereed journal published for clinicians with a primary interest in sports medicine practice. The journal publishes original research and reviews covering diagnostics, therapeutics, and rehabilitation in healthy and physically challenged individuals of all ages and levels of sport and exercise participation. CJSM is the official journal of the American Medical Society for Sports Medicine, the American Osteopathic Academy of Sports Medicine, the Australasian College of Sports Physicians, and the Canadian Academy of Sport Medicine.

About Wolters Kluwer

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Wolters Kluwer reported 2018 annual revenues of €4.3 billion. The group serves customers in over 180 countries, maintains operations in over 40 countries, and employs approximately 18,600 people worldwide. The company is headquartered in Alphen aan den Rijn, the Netherlands.

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