Table 2. Associations between age, BMI, and cardiorespiratory fitness with regional ATT.

ATT	Age		BMI		V̇O2peak
	β	P	β	P	β	P
Frontal	0.47	<0.001	0.24	0.046	0.33	0.042
Parietal	0.57	<0.001	0.23	0.040	0.44	0.004
Temporal	0.46	<0.001	0.25	0.043	0.20	0.225
Occipital	0.62	<0.001	0.19	0.083	0.45	0.003
Motor	0.49	<0.001	0.26	0.034	0.40	0.012
Cingulate	0.32	0.017	0.24	0.063	0.12	0.495

Separate multiple linear regressions were performed for each region (n = 77), independent variables: age, sex, BMI, and V̇O_2peak. Bold indicates significant P-values survived adjustment for multiple comparisons. Abbreviations: β: standardised beta coefficient; ATT: arterial transit time; BMI: body mass index; V̇O_2peak: peak oxygen consumption.