Table 2.

Cross-sectional association between magnetization transfer ratio peak height and cognition

	Tertile of MTR peak height
	Lower	Middle	Upper	β	P-value
STROOP	63.6 (29.3 – 189.3)	55.4 (29.4 – 105.3)	49.9 (30.0 – 98.3)	−0.27	0.045
PWLT immediate	9.7 (3.0 – 15.0)	9.8 (4.0 – 15.0)	10.9 (6.0 – 13.3)	0.24	0.058
PWLT delayed	10.1 (3.0 – 15.0)	10.8 (1.0 – 15.0)	12.1 (7.0 – 15.0)	0.48	0.007
LDCT	23.8 (9.0 – 40.0)	25.5 (11.0 – 36.0)	28.7 (14.0 – 43.0)	1.1	0.006

Absolute values for cognitive function tests per tertile of MTR peak height are shown (mean [minimum - maximum]). P-values and unstandardized β are shown for general linear model multivariate analysis, adjusting for age, sex, education, systolic and diastolic blood pressure, body mass index, smoking, history of vascular disease, individual total white matter lesion load, and brain atrophy

Stroop Stroop test, time in seconds to complete test, PWLT Picture Word Learning Test, number of items correctly recalled in immediate or delayed condition. LDCT Letter Digit Coding Test, number of correct digits