Table 5.

Neuropsychological Performance of Latent Profile Classes

Variable	Mixed MCI Class	Amnestic MCI Class	LPA-Derived Normal Class	Omnibus Wald χ2Test (df)	p-value
Visuoconstructional Ability
MMSE Pentagons	−2.2262,3	−0.4781	−0.1691	χ2(2)=17.829	p<0.001
	(0.403)	(0.079)	(0.080)
Clock Drawing Test	−0.9272,3	−0.2171	−0.0351	χ2(2)=27.685	p<0.001
	(0.198)	(0.064)	(0.080)
Language
Animal Fluency	−1.9532,3	−0.7371,3	−0.1301,2	χ2(2)=100.948	p<0.001
	(0.166)	(0.065)	(0.078)
BNT	−3.2382,3	−0.8741,3	−0.3021,2	χ2(2)=49.202	p<0.001
	(0.562)	(0.139)	(0.086)
Attention/Executive Function
TMT, Part A	−1.9872,3	−0.4131	−0.0361	χ2(2)=51.823	p<0.001
	(0.245)	(0.082)	(0.097)
TMT, Part B	−2.0132,3	−0.7021,3	−0.2561,2	χ2(2)=82.083	p<0.001
	(0.168)	(0.084)	(0.087)
Episodic Memory
AVLT Recall	−1.5243	−1.5963	0.0611,2	χ2(2)=395.429	p<0.001
	(0.126)	(0.059)	(0.034)
AVLT Recognition	−1.7193	−1.5723	0.2051,2	χ2(2)=529.387	p<0.001
	(0.306)	(0.125)	(0.060)

Data summarized as mean (standard error) in Standardized Regression-Based z-scores. Numbered superscripts denote significant Wald χ² test post-hoc differences at p<0.005 between each class and the class number indicated (1= Mixed MCI Class, 2= Amnestic MCI Class, 3= LPA-Derived Normal Class)

Abbreviations: MCI = Mild Cognitive Impairment; LPA = Latent Profile Analysis; χ² = chi-square; df= degrees of freedom; MMSE = Mini-Mental State Examination; BNT = Boston Naming Test; TMT = Trail Making Test; AVLT = Rey Auditory Verbal Learning Test