Table 2.

Fit statistics for confirmatory factor analysis models

	Chi-square	df	p value	CFI	RMSEA [90%CI]	SRMR	Comparison with single-factor model	Comparison with two-factor model
Model 1: single factor	62.952	20	< .001	.891	.108 [.079–.139]	.070	N.A.	N.A.
Model 2: MEM + EF	52.543	19	< .001	.915	.098 [.067–.130]	.064	ChiSq(1) = 10.409, p = .001	N.A.
Model 3A: MEM + EF + IADL	45.269	18	< .001	.931	.091 [.058–.124]	.060	Chisq(2) = 17.683, p < .001	Chisq(1) = 15.873, p < .001

Model 1: Single factor based on all eight CFC subtests

Model 2: MEM = Word Recognition + Orientation + Word Recall, EF = Controlled Word Association Test + Category Fluency + Digit Symbol Substitution + Digit Span Backward + Amsterdam IADL Questionnaire

Model 3: MEM = Word Recognition + Orientation + Word Recall, EF = Controlled Word Association Test + Category Fluency + Digit Symbol Substitution + Digit Span Backward, IADL = Amsterdam IADL Questionnaire

Abbreviations: CFI Comparative Fit Index, EF executive functioning, IADL instrumental activities of daily living; MEM memory, RMSEA Root mean squares of error approximation, SRMR Standardized root mean square residual