Table 3

Power analysis results for auditory components of interest between patients and control subjects^*

Component	Peak latency, ms	Electrode site	Group; average amplitude^† (and SD)		Statistical power reached, %	p value^‡	Minimum n needed to reach power of 80%

			Patient	Control			Patient group	Control group
P₀	15	FC2	0.150 (0.247)	0.399 (0.301)	75	0.008	19	19
P₂₀	21	C3	0.191 (0.302)	0.502 (0.302)	92	0.005	12	12
P_a	38	FC1	0.474 (0.280)	0.962 (0.560)	93	0.006	11	11
P₅₀	46	FC3	0.511 (0.444)	1.238 (0.852)	92	0.007	11	11
N_p65	62	PO7	0.611 (0.479)	1.321 (0.637)	98	0.001	8	8
N1	93	FCz	0.219 (0.876)	1.501 (0.993)	99	0.000	7	7

↵* Single electrodes were used to generate estimates of power for each component.
↵† Values are taken from group averages (patient, n = 21, control subject, n = 15) referenced to the nasion before baseline correcting.
↵‡ 2-tailed t test; 2 sample unequal variance.
SD = standard deviation.