TY - JOUR T1 - Resumption of physical activity within 7 days of a concussion was associated with lower rates of persistent postconcussive symptoms (PPCS) JF - Archives of disease in childhood - Education & practice edition JO - Arch Dis Child Educ Pract Ed SP - 110 LP - 111 DO - 10.1136/archdischild-2017-313141 VL - 103 IS - 2 AU - Anand Nitin Kanani AU - Stuart Hartshorn Y1 - 2018/04/01 UR - http://ep.bmj.com/content/103/2/110.abstract N2 - A planned secondary analysis of a prospective, multicentre cohort study.SettingNine emergency departments (ED) within the Pediatric Emergency Research Canada Network.Aged between 5.00 and 17.99 years and diagnosed with a concussion following a traumatic head injury in the preceding 48 hours.Return to physical activity within 7 days postinjury (ranging from light exercise to a full return to competitive sports).No physical activity within 7 days postinjury. Propensity scores were derived to account for potential confounding baseline characteristics. Patients in each intervention group were matched 1:1 in random order based on the propensity scores.Age, sex, duration of prior concussion, duration of loss of consciousness, presence of symptoms on the initial concussion evaluation, personal/family history of migraine, learning/developmental disorder, … ER -