Table 3.

Correlations of brain ketone bodies with age, arterial blood, brain glucose, glutamate, lactate and pyruvate at the acute fasted phase of TBI.

	Variable	Spearman’s ρ	p
Total brain ketone bodies vs:	Age	0.48	0.004
	Blood glucose	−0.39	<0.0001
	Brain glucose	0.11	0.16
	Brain glutamate	0.29	<0.0001
	Brain lactate	0.14	0.05
	Brain pyruvate	0.23	0.002

Note: Brain interstitial tissue (measured with cerebral microdialysis) and arterial blood data were collected during the acute TBI phase (time from hospital admission to immediately before nutrition start; see also Figure 1).

TBI: traumatic brain injury.