Table 1. Fit Statistics of the 2 to 6-group models and the performance means ± standard deviation in the best-fit model dividing the population into 6 groups.

Fit Statistics of the models dividing the population into 2,3,4,5 or 6 groups**
		2 groups	3 groups	4 groups	5 groups	6 groups
Akaike's Information Criteria		42751.499	42205.134	41890.988	41754.185	41586.804
Bayesian Information Criteria		42816.821	42296.586	42008.569	41897.895	41756.643
Log likelihood		-22032.681	-21365.749	-21088.567	-20927.494	-20855.092
Likelihood ratio test k-1 versus k profiles		<0.0001	<0.0001	<0.0001	0.0097	0.0095
Performance scores mean ± standard deviation in the 6 groups based on the model dividing the population into 6 groups
	Groups within the 6-profile model
	1§	2	3§§	4	5	6
DSST	22.4±9.8	23.5±9.9	43.7±11.4	39±12.9	42±11.2	32.6±13.6
DSST z-score	-1.15±0.71	-1.08±0.71	0.39±0.82	0.04±0.93	0.26±0.81	-0.42±0.98
CES-D	10.7±1.6	3.9±2	2.1±1.7	15±1.8	7.8±1.6	21.9±2.5
Gait speed, m/sec	0.6±0.2	0.6±0.2	1±0.2	0.8±0.2	0.9±0.2	0.7±0.3

DSST: Digit Symbol Substitution Test; CES-D: Center for Epidemiological Depression Scale

^*Performances in the 2 to 5 profile models are provided in an online supplement

^**Lower Model fit statistics indicate better fit of the data

^§Indicates the impaired group

^§§Indicates the control group