Table 3.

Comparison of P300 latency and amplitude between the 2 groups

Groups	n	Incubation (ms)		Amplitude (μV)
		Before treatment	After treatment	Before treatment	After treatment
Observation group	138	397.15 ± 36.16	349.35 ± 28.25#	18.92 ± 6.25	24.02 ± 5.23#
Control group	135	398.21 ± 45.76	366.36 ± 25.81#	19.10 ± 5.73	21.11 ± 4.07
P		.752	<.001	.259	.007

Compared with before treatment, *P < .05, #P < .01.