Table 2.

Results of Pearson correlation analyses between SDMT^a and ACE^b measures.

ACE measures			Covariates	R	P value
All participants (N=77)
	Boxed RTc	N/Ad		–0.57	<.001 e
	Boxed distraction cost	N/A		–0.28	.01 e
	SAATf RT	N/A		–0.36	.001 e
	Spatial Span	N/A		0.34	.003 e
	Boxed RT	age, sex, edug, and BRTh		–0.44	<.001 e
	Boxed distraction cost	age, sex, edu, and BRT		–0.28	.01 e
	SAAT RT	age, sex, edu, and BRT		–0.17	.15
	Spatial Span	age, sex, edu, and BRT		0.18	.12
Participants with MSi (N=53)
	Boxed RT	N/A		–0.50	<.001 e
	Boxed distraction cost	N/A		–0.34	.01 e
	SAAT RT	N/A		–0.22	.10
	Spatial Span	N/A		0.24	.07
	Boxed RT	age, sex, edu, and BRT		–0.43	.002 e
	Boxed distraction cost	age, sex, edu, and BRT		–0.38	.007 e
	SAAT RT	age, sex, edu, and BRT		–0.16	.26
	Spatial Span	age, sex, edu, and BRT		0.18	.21

^aSDMT: Symbol Digit Modalities Test.

^bACE: Adaptive Cognitive Evaluation.

^cRT: reaction time.

^dN/A: not applicable.

^eP values in italic are significant.

^fSAAT: Sustained Attention ACE Task.

^gedu: years of education.

^hBRT: basic reaction time.

ⁱMS: multiple sclerosis.