Table 2.

Mismatch negativity potential amplitudes and latencies

Variable	Subclinical ADHD group (n = 13)	ADHD group (n = 16)	Z	pvalue
MMN amplitude (µV)
Fz	−4.97 ± 1.81	−4.16 ± 1.53	−1.49	0.136
FCz	−4.90 ± 2.32	−3.54 ± 1.23	−2.11	0.035
Cz	−2.90 ± 1.64	−2.23 ± 1.25	−1.14	0.254
CPz	−2.45 ± 1.15	−1.93 ± 1.38	−1.40	0.161
MMN latency (ms)
Fz	208.84 ± 34.89	243.94 ± 23.89	−2.48	0.013
FCz	209.00 ± 31.67	239.88 ± 24.72	−2.57	0.010
Cz	205.31 ± 30.34	215.13 ± 37.51	−0.86	0.392
CPz	201.69 ± 31.07	210.31 ± 41.94	−0.79	0.430

Values are presented as mean ± standard deviation.

ADHD, attention deficit/hyperactivity disorder; MMN, mismatch negativity; Fz, frontal electrode; FCz, fronto-central electrode; Cz, central electrode; CPz, centro-parietal electrode.