Mismatch negativity as a marker for evaluating overall neurocognitive impairment following postconcussion syndrome

Table 1 Demographic and clinical characteristics of patients with postconcussion syndrome and controls, mean ± SD

Parameter	Controls (n = 56)	Patients (n = 63)	P value
Age (years)	42.27 ± 12.04	42.30 ± 12.98	0.993
Sex			0.9831
Male (n)	25	28
Female (n)	31	35
Years of education	9.35 ± 4.10	9.40 ± 3.38	0.962
Injury time (months)		14.95 ± 4.93
IQ	86.03 ± 9.37	72.45 ± 6.00	< 0.001a
ADL scale score	14.54 ± 0.58	16.05 ± 1.31	< 0.001a
FAQ scale score	1.35 ± 1.16	3.35 ± 0.99	< 0.001a
SDSS scale score	0.15 ± 0.37	2.30 ± 0.87	< 0.001a
Scale of personality change following TBI score	3.08 ± 1.57	6.80 ± 2.29	< 0.001a

¹χ² test, other statistics: Student’s t-test.

^aP < 0.05.

IQ: Intelligence quotient; ADL: Activity of daily living; FAQ: Functional activities questionnaire; SDSS: Social disability screening schedule; TBI: Traumatic brain injury.