Table 4:

Bivariate Pearson correlation coefficients (P values) (n = 29 except as noted)

AgeDurationaEDSSFlankerbStroopc
QSM
    GP0.36 (.059)0.10 (.60)0.06 (0.75)0.25 (.20)−0.18 (.36)
    Put0.57 (.001)f0.04 (.85)0.31 (0.09)0.3 (.12)0.01 (.97)
    Cau0.41 (.02)f0.42 (.02)f0.24 (0.20)0.47 (.01)f0.13 (.50)
    Aput0.55 (.0015)f0.05 (.81)0.30 (0.11)0.38 (.045)f0.00 (.99)
    Pput0.57 (.001)f0.09 (.65)0.35 (0.06)0.23 (.25)−0.01 (.94)
R2
    GPd0.32 (.12)0.08 (.68)0.18 (0.38)0.32 (.11)0.065 (.76)
    Pute0.47 (.01)f0.09 (.65)0.43 (0.02)f0.31 (.11)0.21 (.34)
    Caue0.37 (.06)0.29 (.15)0.58 (.001)f0.31 (.11)0.07 (.75)
    Apute0.44 (.02)f0.12 (.54)0.48 (.01)f0.35 (.08)0.17 (.44)
    Ppute0.47 (.01)f0.01 (.96)0.32 (.04)f0.21 (.29)0.28 (.18)
R2*
    GP0.14 (.45)−0.23 (.22)−0.20 (.29)0.2 (.3)−0.24 (.22)
    Put0.38 (.047)f−0.12 (.51)0.25 (.19)0.34 (.075)−0.02 (.92)
    Cau0.29 (.12)−0.02 (.90)0.24 (.20)0.29 (.13)0.27 (.17)
    Aput0.30 (.11)−0.15 (.43)0.26 (.16)0.37 (.055)−0.04 (.84)
    Pput0.45 (.01)f−0.06 (.74)0.17 (.36)0.23 (.23)−0.00 (.99)
  • Note:—Cau indicates caudate; Put, putamen; Aput, cognitive anterior part of putamen, region predominantly connected to frontal cortex; Pput, motor posterior part of putamen, region predominantly connected to sensorimotor cortex.

  • a Using square root transformation for non-normal duration data.

  • b Using square root transformation for non-normal Flanker measure (n = 28).

  • c Stroop measure (n = 27).

  • d For GP R2 n = 27 so that R2–GP versus Flanker (n = 26).

  • e For putamen and caudate R2 n = 28 so that R2–Put, R2–Cau versus Flanker (n = 27).

  • f Statistically significant at P < .05.