Statistical analysis

JW Junqing Wang
YT Yuan Tian
YS Yi Shao
HF Hui Feng
LQ Limin Qin
WX Weiwei Xu
HL Hongjuan Liu
QX Quangang Xu
SW Shihui Wei
LM Lin Ma
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For the cumulative clinical measurements, chi-square test was used for gender and optic neuritis episode comparisons. Then, independent sample t-test was used for duration of NMO-ON or ON and time since last relapse comparisons. One-way analysis of variance (ANOVA) with Bonferroni post hoc test was used for age and Expanded Disability Status Scale (EDSS) comparisons using SPSS version 16.0 (SPSS Inc., Chicago, IL, USA).

A one-way ANOVA was used to identify regions in which the spontaneous activity pattern was different between the AQP4-IgG+NMO-ON and MOG-IgG+ON groups and HCs. We performed post hoc analysis tests after regressing out age and gender effects to compare the ReHo values between each pair of groups (P<0.01, cluster >40 voxels, and AlphaSim corrected).

The relationship between the mean ReHo value of NMO subjects and the clinical features was analyzed by a Pearson correlation analysis using SPSS version 16.0 (P<0.05 was considered to be a significant difference).

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