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Results of subgroup analysis. A, Boxplots of AK show a significant difference between the MTBI subgroup of 2–4 weeks from injury with DSB <1 and the MTBI subgroup of 2–4 weeks from injury with DSB ≥1. B, Boxplots of FA show significant differences between the MTBI subgroup of <2 weeks of injury with LNS <1 and the HC subgroup with LNS <1 and between the HC subgroup with LNS <1 and the HC subgroup with LNS ≥1. The asterisk indicates P < .05; w, weeks.
