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TABLE 2: 
Average diffusivity (SD) metrics in gray matter of control volunteers and of different multiple sclerosis phenotypes studied
ControlsAll MSRRMSSPMSPPMS
Average D̅1.02 (0.04)1.13 (0.09)1.05 (0.05)1.20 (0.07)1.13 (0.06)
D̅ peak height73.0 (11.5)55.0 (12.7)67.0 (11.2)45.8 (7.6)52.3 (8.1)
D̅ peak location0.86 (0.04)0.92 (0.08)0.89 (0.06)0.95 (0.09)0.90 (0.07)
  • Note.—Average diffusivity and the peak location of the average diffusivity histogram are expressed in units of mm2s−1 × 10−3. RRMS indicates relapsing-remitting multiple sclerosis; SPMS, secondary progressive multiple sclerosis; PPMS, primary progressive multiple sclerosis; D̅ = mean diffusivity. For further details and statistical analysis, see text.