To the Editor In their study examining rates of persistent postconcussive symptoms (PPCS) in children and adolescents with early vs later return to physical activity, Dr Grool and colleagues found that PPCS occurred in 30.4% of all participants.1 Although their main finding that PPCS was observed less frequently in participants who began activity within 7 days after acute concussion compared with those who abstained during the same period (28.7% vs 40.1%) provides the groundwork for continued study into the effects and timing of physical activity during recovery from concussion, the high rate of PPCS in the study population should also be highlighted.
Young GR, Tsao JW. Rate of Persistent Postconcussive Symptoms. JAMA. 2017;317(13):1375. doi:10.1001/jama.2017.1322
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