Figure 3.

Correlations between clinical outcomes and the cross‐sectional area. Above: scatterplots of correlation between CSA measured at C3 level and disease duration (A), vibration score measured at the internal malleolus and hallux (B and D) and EDSS (C). Below: correlation coefficients for clinical outcomes and CSA. *Statistically significant P‐value. ¹Spearman's rank‐order correlation test. ²Pearson's correlation test. Abbreviations: CSA, cross‐sectional area; EDSS, expanded disability status scale; SSPROM, severity scoring system for progressive myelopathy; 6MWT, 6 Minute Walk Test