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  • Title: Do Initial Symptom Factor Scores Predict Subsequent Impairment Following Concussion?
    Author: Cohen PE, Sufrinko A, Elbin RJ, Collins MW, Sinnott AM, Kontos AP.
    Journal: Clin J Sport Med; 2020 Mar; 30 Suppl 1(Suppl 1):S61-S68. PubMed ID: 32132479.
    Abstract:
    OBJECTIVE: Symptom factors present during the first week following concussion may predict subsequent concussion outcomes and recovery duration. We hypothesized that a high loading on cognitive-fatigue-migraine and somatic factors would be predictive of neurocognitive impairment following concussion. We also hypothesized that the affective factor would be related to vestibular symptoms and impairment. DESIGN: Prospective repeated measures. SETTING: Concussion specialty clinic. PARTICIPANTS: Athletes aged 13 to 20 years diagnosed with a concussion within the past 7 days. INDEPENDENT VARIABLE: Symptom factors at the initial visit 1 to 7 days after injury. MAIN OUTCOME MEASURE: Symptom factor score, neurocognitive testing, and vestibular/ocular motor assessment at the second visit (2-4 weeks after injury). RESULTS: The somatic symptom factor from the initial visit was significant (P < 0.05) in all vestibular/ocular screening components (P < 0.05) but not neurocognitive test performance (P > 0.05) at the second visit. The cognitive-migraine-fatigue and affective symptom factors predicted symptom burden at the second visit (P < 0.001) but did not predict recovery time (P = 0.200). CONCLUSIONS: The somatic symptom factor during the first week after injury predicted symptom provocation during vestibular/ocular screening at 2 to 4 weeks after injury. Specifically, higher scores on somatic symptom factor at the initial visit predicted worse symptom reporting for all vestibular/ocular screening components at the second visit. Patients with higher scores on the cognitive-migraine-fatigue and affective symptom factors at the initial visit predicted total symptom burden at the second visit.
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