Table 2.

Mean (SD) Amplitude of Mismatch Negativity of Among-Group Differences

Site (μV)	Schizophreniaa (N = 38)	Bipolar Disorderb (N = 37)	Healthy Controlsc (N = 32)	Effect Size (η2)	P	Post hoc (LSD)
F3	−1.40 ± 1.03	−1.95 ± 1.25	−2.73 ± 1.53	0.166	<.001	a < c, b < c
Fz	−1.82 ± 1.03	−2.17 ± 1.49	−3.23 ± 1.72	0.161	<.001	a < c, b < c
F4	−1.65 ± 1.23	−2.02 ± 1.56	−3.30 ± 1.86	0.182	<.001	a < c, b < c
FC3	−1.56 ± 1.04	−2.10 ± 1.34	−2.90 ± 1.63	0.154	<.001	a < c, b < c
FCz	−1.77 ± 0.98	−2.33 ± 1.51	−3.42 ± 1.71	0.184	<.001	a < c, b < c
FC4	−1.61 ± 1.09	−2.26 ± 1.57	−3.43 ± 1.71	0.221	<.001	a < c, b < c
C3	−1.49 ± 1.13	−1.97 ± 1.26	−2.75 ± 1.61	0.153	<.001	a < c, b < c
Cz	−1.54 ± 1.08	−1.97 ± 1.54	−2.89 ± 1.85	0.133	.001	a < c, b < c
C4	−1.46 ± 1.05	−1.98 ± 1.47	−3.11 ± 1.82	0.195	<.001	a < c, b < c
Average MMN	−1.59 ± 0.92	−2.08 ± 1.35	−3.09 ± 1.67	0.194	<.001	a < c, b < c

Note: Premorbid IQ was used as a covariate. LSD, least significant difference; MMN, mismatch negativity.