Table 2.

Correlations with age at injury

	All TBI (n = 71)		DAI (n = 20)		TBI focal (n = 51)
	r	P	r	P	r	P
Deep superficial lag	−0.427	0.0002	−0.498	0.025	−0.417	0.0023
Sulcal space size	−0.143	0.234	−0.036	0.881	−0.175	0.220
Ventricular size	0.111	0.355	−0.070	0.768	0.159	0.264
Parenchymal size	−0.041	0.734	−0.233	0.322	0.010	0.942

Perfusion timing differences between the deep and superficial venous regions and the three volumetric measures are compared. Adjustments were made for present age using healthy control data, with corresponding P-values from the univariate Pearson’s correlation. Volumes are converted to the cubic root equivalent and corrected for total subarachnoid volume. Patients with TBI who did not meet the criteria for DAI were classified TBI focal. There was a correlation between the venous timing abnormality and age at injury. Values in bold indicate significant correlations.