TABLE 3.

Analysis of PMS genetic classes and electrophysiological measures.

	Group mean (SE)		Statistics
	Class I	Class II	F Statistic	p-Value
Initial tone
N1 amplitude	−3.93	0.08	F = 4.58	0.07
P2 amplitude	5.16	2.80	F = 5.42	0.04
N2 amplitude	−2.29	−3.04	F = 2.51	0.14
N1 latency	209.10	202.00	F = 0.12	0.75
P2 latency	303.09	286.00	F = 0.29	0.62
N2 latency	416.18	407.00	F = 0.15	0.72
Habituation
N1 amplitude	−2.30	0.49	F = 9.47	0.01
P2 amplitude	2.80	1.37	F = 2.38	0.16
N2 amplitude	−0.99	−1.31	F = 0.18	0.68