. Author manuscript; available in PMC: 2017 Jun 13.

Published in final edited form as: J Head Trauma Rehabil. 2015 May-Jun;30(3):198–206. doi: 10.1097/HTR.0000000000000097

TABLE 4.

Percentage correct by pre- and posttest question, NFHS/CDC’s “Concussion in Sports: What You Need to Know,” November 2012 to July 2013

	Pretest		Posttest
Question	No. correct	%	No. correct	%
Q1. Interferes with brain function	115 479	86.3	130 822	97.8
Q2. Mild blow can cause injury	121 835	91.1	130 393	97.5
Q3. Returning too soon can increase risk	132 312	98.9	133 477	99.8
Q4. Symptoms can affect all brain function	132 494	99.1	133 054	99.5
Q5. How to decrease long-term problems	32 367	24.2	82 348	61.6

Note: n = 133 764.