Table 5:

Correlation coefficients (P values) for semipartial correlations after adjusting MRI parameters for age and EDSS for disease duration

	GP	Put	Cau	Aput	Pput
Sqrt (Flanker) vs age-adjusted QSM	0.26 (.18)	0.36 (.063)	0.51 (.0058)^{^a}	0.45 (.016)^{^a}	0.26 (.17)
Sqrt (Flanker) vs age-adjusted R2	0.33 (.09)	0.34 (.08)	0.31 (.11)	0.37 (.056)	0.23 (.25)
Duration-adjusted EDSS vs age-adjusted QSM	0.00 (.98)	0.39 (.036)^{^a}	0.01 (.95)	0.34 (.07)	0.40 (.032)^{^a}
Duration-adjusted EDSS vs age-adjusted R2	0.16 (.43)	0.51 (.0059)^{^a}	0.46 (.014)^{^a}	0.51 (.0054)^{^a}	0.44 (.019)^{^a}

Note:—Sqrt indicates the square root transformation used for the non-normal distributed Flanker test metrics; Cau, 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 Statistically significant at P < .05.