Early disability in ambulatory patients with multiple sclerosis: optical coherence tomography versus visual evoked potentials, a comparative study

Table 2 VEP and OCT measurements for patients with MS and healthy controls

Variable	Subject	Mean ± SEM	T value	P value
P100 latency	Case	132.3 ± 2.2	9.673	< 0.001
P100 latency	Control	107.7 ± 1.8	9.673	< 0.001
N75/P100 amplitude	Case	7.8 ± 0.48	21.448	< 0.001
N75/P100 amplitude	Control	13.7 ± 0.56	21.448	< 0.001
RNFL thickness	Case	99.5 ± 1.3	5.061	< 0.001
RNFL thickness	Control	112.8 ± 2	5.061	< 0.001
GCLC thickness	Case	87.6 ± 0.9	4.888	< 0.001
GCLC thickness	Control	95.8 ± 1	4.888	< 0.001
GLV	Case	10.6 ± 0.7	7.165	< 0.001
GLV	Control	5.1 ± 0.39	7.165	< 0.001
FLV	Case	2.7 ± 0.3	4.444	< 0.001
FLV	Control	1.3 ± 0.1	4.444	< 0.001

RNFL retinal nerve fiber layer, GCLC ganglion cell layer complex, GLV global loss volume, FLV focal loss volume