Table 1.

Correlation coefficients between studied variables and visual outcome.

	Patients (eyes)	Spearman's rho with VA after 1 year	p-value
Age at ON onset	n = 32 (36)	0.404	0.0146
AQP4-IgG titer before starting IVMP	n = 23 (27)	0.237	0.23
ON-involved segments in orbital MRI (0–6)	n = 26 (28)	0.669	<0.0001
Treatments in the acute phase of ON
Days from ON onset to starting IVMP	n = 32 (36)	0.502	0.0018
Cycles of IVMP	n = 32 (36)	−0.235	0.17
Cycles of IVMP among those treated	n = 29 (32)	−0.013	0.95
Days from ON onset to starting PLEX	n = 32 (36)	0.132	0.44
Cycles of PLEX	n = 32 (36)	−0.156	0.36
ON-involved eyes further treated by adjunctive PLEX after IVMP pulse therapy
Days from ON onset to starting PLEX	n = 19 (21)	0.21	0.37
Cycles of PLEX	n = 19 (21)	−0.25	0.28

The p-values shown are the results of the test of no correlation.

AQP4-IgG, anti-aquaporin-4 autoantibody; IVMP, intravenous methylprednisolone; ON, optic neuritis; PLEX, plasma exchange; VA, visual acuity.