Table 4.

Correlation of clinical variables and neuropsychological tests with RCMRG in the PCC in participants with delirium, using pontine normalisation.^a

	rCMRG right PCC		rCMRG left PCC
	Spearman's ρ	p	Spearman's ρ	p
Age	−0.08	0.81	−0.01	0.97
Delirium indexc	−0.45	0.12	−0.42	0.15
Delirium index attention scorec	−0.22	0.47	−0.18	0.57
Mini-mental state examinationb	0.60	0.03*	0.67	0.01*
Mini-mental state examination attention scoreb	0.47	0.11	0.57	0.04*
Delirium duration at time of scan	−0.49	0.09	−0.58	0.04*
APACHE-IIIc	−0.47	0.10	−0.43	0.15
WAIS-IV digit span test: forwardsb (/16)	0.65	0.017*	0.65	0.015*
WAIS-IV digit span test: backwardsb (/14)	0.14	0.66	0.24	0.43

^aData for 13 participants with usable data taken during delirium.

^bHigher scores indicate better performance.

^cHigher scores indicate worse performance.

^dA maximum time of 300 s was allowed before test was ceased.

^*p < 0.05.

rCMRG: regional cerebral metabolic rate of glucose consumption; PCC: posterior cingulate cortex; APACHE-III: acute physiology and chronic health evaluation III; WAIS-IV: Wechsler adult intelligence scale IV; WMS-III: Wechsler memory scale-III.