. 2018 Mar 21;4(1):e000312. doi: 10.1136/bmjsem-2017-000312

Table 4.

Median scores and Mann-Whitney U test results for all SCAT3 components and the 22 listed symptoms at both baseline and postconcussion by history of concussion

	Baseline			Postconcussion
	No concussion history (n=50)	Previous concussion (n=38)	Mann-Whitney U test	No concussion history (n=50)	Previous concussion (n=38)	Mann-Whitney U test
	Median	Median	Z	Median	Median	Z
Number of symptoms	0	1	−1.58^NS	11.5	9	−0.245^NS
Symptom severity	0	2	−1.589^NS	23	22.5	−0.177^NS
Headache	0	0	−0.806^NS	3	2.5	−0.857^NS
Pressure in head	0	0	−1.032^NS	2	2	−1.005^NS
Neck pain	0	0	−2.602**	0	1	−0.483^NS
Nausea/vomiting	0	0	−0.844^NS	0	0	−0.170^NS
Dizziness	0	0	−0.455^NS	1	1	−1.083^NS
Blurred vision	0	0	−0.094^NS	0	0	−1.238^NS
Balance problems	0	0	−0.045^NS	1	0	−1.054^NS
Sensitivity to light	0	0	−1.162^NS	0	1	−0.239^NS
Sensitivity to noise	0	0	−0.318^NS	0	0	−0.145^NS
Feeling slowed down	0	0	−0.748^NS	1	2	−0.647^NS
Feeling in a fog	0	0	−0.084^NS	1	0	−0.666^NS
Don’t feel right	0	0	−0.064^NS	2	2	−0.039^NS
Difficulty concentrating	0	0	−0.423^NS	1.5	0	−0.958^NS
Difficulty remembering	0	0	−1.218^NS	0	0	−0.190^NS
Fatigue/low energy	0	0	−2.415*	1	1	−0.030^NS
Confusion	0	0	−0.362^NS	0	0	−0.895^NS
Drowsiness	0	0	−0.851^NS	0.5	1	−0.063^NS
Trouble falling asleep	0	0	−1.261^NS	0	0	−0.971^NS
More emotional	0	0	−1.141^NS	0	0	−0.210^NS
Irritability	0	0	−1.203^NS	0	0	−0.306^NS
Sadness	0	0	−0.401^NS	0	0	−0.497^NS
Nervous/anxious	0	0	−1.441^NS	0	0	−0.825^NS
SAC	27	27	−0.381^NS	26	26	−0.574^NS
Orientation	5	5	−0.747^NS	5	5	−0.313^NS
Immediate memory	15	15	−0.044^NS	15	15	−0.854^NS
Concentration	4	3	−1.403^NS	4	4	−0.070^NS
Delayed recall	4	4	−0.140^NS	3	3	−0.930^NS
m-BESS	3	3	−0.505^NS	4	4	−0.469^NS
Tandem gait	10	11.3	−1.562^NS	11.3	11.6	−0.761^NS
Coordination	1	1	−0.630^NS	1	1.0	−1.619^NS

*P<0.05, **p<0.01.

m-BESS, modified Balance Error Scoring System; NS, non-significant; SAC, Sideline Assessment of Concussion; SCAT3, Sport Concussion Assessment Tool 3.