Vocabulary Is an Appropriate Measure of Premorbid Intelligence in a Sample with Heterogeneous Educational Level in Brazil

Table 2

Cognitive performance for NC, MCI, and AD.

Tests	NC	aMCI	AD	P *
	Mean (SD)	Mean (SD)	Mean (SD)
MMSE	28.36 (1.48)	25.79 (2.74)	23.96 (2.90)	<0.01^a
Vocabulary	26.46 (9.81)	22.81 (9.38)	23.20 (9.16)	0.146
BD	25.43 (8.93)	18.39 (8.53)	14.18 (6.53)	<0.01^b
RCM	25.84 (6.23)	20.47 (6.31)	17.76 (5.99)	<0.01^b
Estimated IQ	98.77 (10.41)	91.08 (10.13)	87.95 (8.92)	<0.01^b

Note. P value refers to Kruskal-Wallis test; SD: standard deviation; MCI: mild cognitive impairment; AD: Alzheimer’s disease; MMSE: Mini-Mental State Exam; IQ: intelligence quotient; BD: Block Design; RCM: Raven Colored Matrices.
^aAll groups differ.
^bNC differ from AD and aMCI; MCI is equal to AD.