Fig. 2
From: Evaluating the effectiveness of traumatic brain injury state laws among high school athletes
Estimated trends by TBI law language regarding healthcare provider RTP clearance requirements, 2005/06–2017/18. a Incident concussion rates-specified category of healthcare provider; b recurrent concussion rates-specified category of healthcare provider; c incident concussion rates-category of healthcare provider not specified; d recurrent concussion rates-category of healthcare provider not specified