FIG 2. A and B, Mean (per patient) lesional MTR versus NAA/Cr for the entire cohort of patients with MS (A) and the relapsing-remitting subgroup (B) (circles indicate relapsing-remitting group; plus signs, primary progressive; diamonds, secondary progressive). Linear regression lines are plotted for both data sets, but the correlation was significant only for the relapsing-remitting subgroup (solid line in B; r_S = .70; P = .016)