Table 2.

Means (SD) for the Frontal Systems Behavior Scale (FrSBe) norm-based z-scores for groups divided by diagnosis (AD, DLB) and stage of cognitive impairment (mild, moderate) on the Mini-Mental State Examination (MMSE).

	AD				DLB
FrSBe Ratings	Mild N=15		Moderate N=23		Mild N=11		Moderate N=8
Apathy	−2.6	(1.7)	−2.7	(1.6)	−1.1 #	(1.8)	−4.1 *°	(1.3)
Disinhibition	−1.6	(2.0)	−.83	(2.2)	0.86 ∞	(0.47)	−.68 +	(1.4)
Executive Dysfunction	−3.5	(2.0)	−3.7	(2.2)	−1.2 #	(1.8)	−4.6 °	(1.9)
Total	−3.3	(2.3)	−3.2	(2.2)	−.68 #	(1.6)	−4.1 °	(1.6)

SD = Standard Deviation

AD = Alzheimer’s disease

DLB = Dementia with Lewy bodies

T-tests

DLB: Mild versus Moderate

^°Apathy: p<0.01, t=−4.07, df=17

^°Executive Dysfunction: p<0.01, t=−3.97, df=17

^°Total: p<0.001, t=−4.56, df=17

Mild: AD versus DLB

^#Apathy: p<0.05, t=−2.18, df=24

^#Executive Dysfunction: p<0.01, t=−3.02, df=24

^#Total: p<0.01, t=−3.25, df=24

^*Moderate: AD versus DLB Apathy: p<0.05, t=2.23, df=29

Mann Whitney U-test

^∞Mild: AD versus DLB Disinhibition: p<0.001, U=6.50

⁺DLB: Mild versus Moderate Disinhibition: p<0.01, U=11.00