Table 4.

Comparison of imaging between groups^a

	DLB group, mean (s.d.)	Non-DLB group, mean (s.d.)	t-test	P
CT, head	0.73 (0.7)	0.81 (0.6)	−0.71	0.77
MRI, head	0.32 (0.5)	0.17 (0.4)	2.1	0.04
FP-CIT	0.45 (0.5)	0.03 (0.2)	6.5	<0.001
Perfusion brain SPECT	0.14 (0.3)	0.15 (0.4)	−0.29	0.78

DLB, dementia with Lewy bodies; CT, computed tomography; MRI, magnetic resonance imaging; FP-CIT, ¹²³I-N-ω-fluoropropyl-2beta-carbomethoxy-3beta-4-iodophenyl nortropane brain single-photon emission computerised tomography; SPECT, single-photon emission computerised tomography.

^a.Comparison of the mean number of each brain imaging test per patient, carried out prior to the final diagnosis in each group.