Fig. 3

On-study change in spinal cord area: comparison of patient and control groups. Normalized spinal cord area (SCA) in patients with relapsing-remitting multiple sclerosis (MS) on interferon β-1a treatment vs. normal controls (NC) over 2 years. Means and standard deviation error bars are shown. SCA showed no change in the MS (p = 0.106) or NC (p = 0.524) groups over 2 years. Between group analysis indicated no differences in on-study SCA change (year 1 vs. baseline, p = 0.780; year 2 vs. year 1, p = 0.245; year 2 vs. baseline, p = 0.712). See also Table 3