Association between Asymptomatic Unilateral Internal Carotid Artery Stenosis and Electrophysiological Function of the Retina and Optic Nerve

Table 3

Mean values (±standard deviation) of PERG and PVEP amplitudes and peak times in EIS, ECS, and control eyes.

Parameter	EIS	ECS	Control	value
				EIS versus control^a	ECS versus control^a	EIS versus ECS^b
PERG
N35-P50 amplitude (μV)	2.78 ± 1.67	2.63 ± 2.02	3.65 ± 1.51	0.01	0.0002	0.19
P50 peak time (ms)	53.87 ± 4.95	52.64 ± 4.13	54.19 ± 3.16	0.47	0.03	0.57
P50-N95 amplitude (μV)	4.22 ± 2.97	3.75 ± 2.91	5.62 ± 2.24	0.002	<0.0001	0.06
PVEP
P100 amplitude (μV) (1°4′)	7.1 ± 3.93	7.21 ± 3.97	7.96 ± 3.47	0.13	0.20	0.58
P100 amplitude (μV) (0°8′)	8.63 ± 5.75	8.4 ± 4.8	9.15 ± 5.13	0.43	0.43	0.34
P100 peak time (ms) (1°4′)	112.91 ± 10.84	114.5 ± 8.63	111.23 ± 8.48	0.52	0.07	0.13
P100 peak time (ms) (0°8′)	118.24 ± 11.95	119.57 ± 11.42	118.83 ± 8.2	0.63	0.44	0.65

^aMann–Whitney test; ^bWilcoxon signed-rank test.