Risk Factors for Prolonged Symptoms of Mild Traumatic Brain Injury: A Pediatric Sports Concussion Clinic Cohort

Objective: To examine predictors of prolonged symptom duration from mild traumatic brain injury (mTBI) in a pediatric sports medicine specialty clinic cohort as these predictors may be distinct in this population. Design: Retrospective chart review. Setting: Outpatient specialty clinic. Patients: Charts of 549 patients (age range: 10-18 years) with concussions were reviewed in an outpatient clinic that predominantly managed sports-related injuries (77.3%). Patients (n = 431) included in the final analysis met the criteria for mTBI and were symptomatic at their first visit. Assessment of Risk Factors: Patient history, injury, and recovery variables were evaluated. Main Outcome Measures: Predictors of prolonged time to reach self-reported symptom recovery were evaluated using Cox proportional hazards. Results: Median time to symptom recovery of the 431 patients who presented to clinic with symptoms was 40 days (full clinic sample median = 34 days). Analyses identified 3 unique predictors of symptom recovery: loss of consciousness (LOC) [hazard ratio (HR) = 0.56, P

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